GE MOTOR MANAGER 2 Instruction Manual

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GE Power Management

MM2

MOTOR MANAGER 2

Instruction Manual

MM2 Firmware Revision: 4.0x

MM2 Software Revision: 4.0X or newer

Manual P/N: 1601-0056-DN (GEK-106294)

Units must be powered up at least once per year to avoid deterioration of electrolytic capacitors and subsequent relay failure.

NOTE

GE Power Management

215 Anderson Avenue, Markham, Ontario Canada L6E 1B3 Tel: (905) 294-6222 Fax: (905) 294-8512 Internet:

KWWSZZZ*(LQGXVWULDOFRPSP

Manufactured under an

ISO9001 Registered system.

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These instructions do not purport to cover all details or variations in equipment nor provide for every possible contingency to be met in connection with installation, operation, or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purpose, the matter should be referred to the General Electric Company .

To the extent required the products described herein meet applicable ANSI, IEEE, and NEMA standards; but no such assurance is given with respect to local codes and ordinances because they vary greatly.

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1. INTRODUCTION

2. INSTALLATION

1.1 OVERVIEW

1.1.1 DESCRIPTION..............................................................................1-1

1.1.2 FEATURES ...................................................................................1-1

1.2 ORDERING

1.2.1 ORDER CODES ...........................................................................1-2

1.2.2 ACCESSORIES ............................................................................1-3

1.2.3 SPECIAL ORDER.........................................................................1-3

1.3 SPECIFICATIONS

1.3.1 MM2 SPECIFICATIONS ...............................................................1-4

2.1 MOUNTING

2.1.1 DESCRIPTION..............................................................................2-1

2.2 INPUTS AND OUTPUTS

2.2.1 PHASE CT INPUTS......................................................................2-5

2.2.2 GROUND FAULT CT INPUT ........................................................2-5

2.2.3 SUPPLY VOLTAGE......................................................................2-5

2.2.4 GROUND SURGE ........................................................................2-5

2.2.5 EXTERNAL CONNECTIONS........................................................2-5

2.2.6 THERMISTOR INPUT...................................................................2-6

2.2.7 ANALOG INPUT ...........................................................................2-6

2.2.8 AUX 2 COIL ..................................................................................2-6

2.2.9 OUTPUT RELAYS ........................................................................2-6

2.2.10 SWITCH INPUTS..........................................................................2-6

2.2.11 PROGRAMMABLE SWITCH INPUTS..........................................2-6

2.2.12 SERIAL COMMUNICATION PORT..............................................2-7

2.2.13 STOP ............................................................................................2-7

2.2.14 START A / START B.....................................................................2-8

2.2.15 LOCAL ISOLATOR N/O................................................................2-8

2.2.16 CONTACTOR STATUS................................................................2-8

2.2.17 SWITCH COMMON......................................................................2-8

2.2.18 DIELECTRIC STRENGTH TESTING ...........................................2-8

3. HARDWARE

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3.1 FACEPLATE FUNCTIONS

3.1.1 DESCRIPTION..............................................................................3-1

3.1.2 MESSAGE DISPLAY ....................................................................3-1

3.1.3 INDICATOR LEDs.........................................................................3-2

3.2 KEYPAD

3.2.1 SETPOINTS KEY..........................................................................3-3

3.2.2 ACTUAL VALUES KEY.................................................................3-3

3.2.3 STORE KEY..................................................................................3-4

3.2.4 STOP KEY ....................................................................................3-4

3.2.5 RESET KEY .................................. ................................................3-4

3.2.6 START A KEY...............................................................................3-4

3.2.7 START B KEY...............................................................................3-5

3.2.8 MESSAGE UP/DOWN KEYS .......................................................3-5

3.2.9 MESSAGE LEFT/RIGHT KEYS....................................................3-5

3.2.10 VALUE UP/DOWN KEYS .............................................................3-5

3.3 THEORY OF OPERATION

3.3.1 HARDWARE DESCRIPTION........................................................3-6

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TABLE OF CONTENTS

4. SETPOINTS

4.1 OVERVIEW

4.1.1 DESCRIPTION............................................................................. 4-1

4.1.2 ABBREVIATIONS ........................................................................ 4-1

4.2 S1 CONFIGURATION

4.2.1 DESCRIPTION............................................................................. 4-3

4.2.2 COMMUNICATIONS.................................................................... 4-3

4.2.3 MOTOR IDENTIFICATION ............................. ...... ...... ..... ...... ...... 4-3

4.2.4 STARTER.....................................................................................4-4

4.2.5 CT / VT INPUTS........................................................................... 4-5

4.2.6 THERMISTOR.............................................................................. 4-6

4.2.7 FAULT MODE .............................................................................. 4-6

4.2.8 STATISTICS.................................................................................4-7

4.2.9 PROGRAMMABLE MESSAGE.................................................... 4-7

4.2.10 PREFERENCES .......................................................................... 4-7

4.3 S2 PROTECTION

4.3.1 DESCRIPTION............................................................................. 4-8

4.3.2 STANDARD OVERLOAD CURVES............................................. 4-8

NEMA COMPATIBLE OVERLOAD CURVES

4.3.3

4.3.4 MOTOR PROTECTION – THERMAL ........................................ 4-12

4.3.5 MOTOR PROTECTION – GROUND FAULT............................. 4-13

4.3.6 MOTOR PROTECTION – OPTIONS......................................... 4-15

4.3.7 LOAD PROTECTION................................................................. 4-17

4.3.8 UNDER/OVERVOLTAGE PROTECTION.................................. 4-19

...........................4-10

4.4 S3 PROCESS

4.4.1 DESCRIPTION........................................................................... 4-20

4.4.2 PROGRAMMABLE INPUTS ...................................................... 4-20

4.4.3 INTERLOCK NAMES................................................................. 4-25

4.4.4 STOP CONFIGURATION .......................................................... 4-25

4.4.5 ANALOG INPUT......................................................................... 4-26

5. ACTUAL VALUES

4.5 S4 CONTROL

4.5.1 DESCRIPTION........................................................................... 4-28

4.5.2 UNDERVOLTAGE AUTORESTART.......................................... 4-28

4.5.3 AUX RELAY 1/2 CONFIG .......................................................... 4-29

4.6 S5 MONITORING

4.6.1 DESCRIPTION........................................................................... 4-32

4.6.2 PLANT CONDITION................................................................... 4-32

4.6.3 PRESET COUNTERS AND TIMERS......................................... 4-33

4.7 S6 FACTORY DATA

4.7.1 DESCRIPTION........................................................................... 4-34

4.7.2 PRODUCT FIRMWARE ............................................................. 4-34

4.7.3 PRODUCT MODEL IDENTIFICATION ...................................... 4-34

4.7.4 FACTORY SERVICE DATA.......................................................4-34

5.1 OVERVIEW

5.1.1 DESCRIPTION............................................................................. 5-1

5.1.2 DEFAULT MESSAGE SELECTION.............................................5-1

5.1.3 ABBREVIATIONS ........................................................................ 5-2

5.2 A1 DATA

5.2.1 DESCRIPTION............................................................................. 5-3

5.2.2 MOTOR DATA ................................ ..... ...... .................................. 5-3

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TABLE OF CONTENTS

5.2.3 PROCESS DATA..........................................................................5-4

5.2.4 PROGRAMMABLE MESSAGE.....................................................5-4

5.3 A2 STATUS

5.3.1 DESCRIPTION..............................................................................5-5

5.3.2 TRIP DATA ...................................................................................5-5

5.3.3 ALARM DATA ...............................................................................5-6

5.3.4 MOTOR STATUS..................................... ...... ...............................5-8

5.4 A3 INPUTS

5.4.1 DESCRIPTION..............................................................................5-9

5.4.2 INPUT CONTACTS STATUS .................................................... ...5-9

5.5 A4 STATISTICS

5.5.1 DESCRIPTION............................................................................5-11

5.5.2 TIMERS.......................................................................................5-11

5.5.3 COUNTERS ................................................................................5-11

6. COMMUNICATIONS

6.1 MM2 MODBUS PROTOCOL

6.1.1 OVERVIEW...................................................................................6-1

6.1.2 ELECTRICAL INTERFACE...........................................................6-1

6.1.3 DATA FRAME FORMAT AND DATA RATE.................................6-1

6.1.4 DATA PACKET FORMAT.......................................................... ...6-2

6.1.5 ERROR CHECKING .....................................................................6-2

6.1.6 CRC-16 ALGORITHM...................................................................6-3

6.1.7 TIMING..........................................................................................6-4

6.1.8 MM2 SUPPORTED FUNCTIONS.................................................6-4

6.2 MODBUS FUNCTIONS

6.2.1 FUNCTION CODE 01H.................................................................6-5

6.2.2 FUNCTION CODE 03H.................................................................6-6

6.2.3 FUNCTION CODE 04H.................................................................6-7

6.2.4 FUNCTION CODE 05H.................................................................6-8

6.2.5 FUNCTION CODE 06H.................................................................6-9

6.2.6 FUNCTION CODE 07H...............................................................6-10

6.2.7 FUNCTION CODE 08H...............................................................6-11

6.2.8 FUNCTION CODE 10H...............................................................6-12

6.3 ERROR RESPONSES

6.3.1 DESCRIPTION............................................................................6-13

6.4 APPLICATIONS

6.4.1 PERFORMING COMMANDS USING FUNCTION CODE 10H...6-14

6.4.2 STORING COMM ADDRESS USING THE BROADCAST

COMMAND.................................................................................6-15

6.4.3 USING THE USER DEFINABLE MEMORY MAP.......................6-16

6.4.4 USER DEFINABLE MEMORY MAP DEFAULT VALUES...........6-17

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6.5 MEMORY MAP

6.5.1 DESCRIPTION............................................................................6-19

6.5.2 MEMORY MAP TABLE...............................................................6-20

6.6 DATA FORMATS

6.6.1 DATA FORMATS TABLE..................................... ..... ...... ..... .......6-41

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TABLE OF CONTENTS

7. TESTING

8. MM2PC® SOFTWARE

7.1 INJECTION TESTING

7.1.1 PRIMARY INJECTION TESTING ................................................ 7-1

7.1.2 SECONDARY INJECTION TESTING.......................................... 7-1

7.2 FUNCTIONAL TESTS

7.2.1 PHASE CURRENT FUNCTIONS................................................. 7-3

7.2.2 UNBALANCE EXAMPLES .................................... ...... ..... ...... ...... 7-4

7.2.3 GROU ND FAULT CURRENT FUNCTIONS ................................7-5

7.2.4 INPUT FUNCTIONS.............................................. ...... ..... ...... ...... 7-5

7.2.5 THERMISTOR INPUT TESTS ..................................................... 7-6

7.2.6 POWER FAIL TEST.....................................................................7-6

8.1 OVERVIEW

8.1.1 DESCRIPTION............................................................................. 8-1

8.1.2 HARDWARE & SOFTWARE REQUIREMENTS.......................... 8-1

8.1.3 CHECKING IF INSTALLATION/UPGRADE IS REQUIRED ........ 8-2

8.2 INSTALLING MM2PC

8.2.1 SOFTWARE INSTALLATION/UPGRADE .................................... 8-3

8.3 CONFIGURATION

8.3.1 CONFIGURING MM2PC®............................................................ 8-4

8.3.2 MM2PC

8.4 USING MM2PC

8.4.1 SAVING SETPOINTS TO A FILE ................................................ 8-7

8.4.2 MM2 FIRMWARE UPGRADES.................................................... 8-8

8.4.3 LOADING SETPOINT FILES ....................................................... 8-9

8.4.4 ENTERING SETPOINTS ........................................................... 8-10

8.4.5 VIEWING ACTUAL VALUES ..................................................... 8-11

PROGRAM MENUS..................................................... 8-6

9. STARTER TYPES

8.5 CHASSIS MOUNT UNITS

8.5.1 DESCRIPTION........................................................................... 8-13

8.5.2 SETTING THE BAUD RATE AND PARITY ...............................8-13

9.1 FV NON-REVERSING STARTER

9.1.1 DESCRIPTION............................................................................. 9-1

9.1.2 MM2 SEQUENCES...................................................................... 9-1

9.2 FV REVERSING STARTER

9.2.1 DESCRIPTION............................................................................. 9-3

9.2.2 MM2 SEQUENCES...................................................................... 9-4

9.2.3 NOTES......................................................................................... 9-4

9.3 TWO SPEED STARTER

9.3.1 DESCRIPTION............................................................................. 9-6

9.3.2 MM2 SEQUENCES...................................................................... 9-7

9.4 SLIP RING STARTER

9.4.1 DESCRIPTION........................................................................... 9-11

9.4.2 MM2 SEQUENCES.................................................................... 9-12

9.5 PRIMARY RESISTANCE STARTER

9.5.1 DESCRIPTION........................................................................... 9-14

9.5.2 MM2 SEQUENCE ...................................................................... 9-15

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TABLE OF CONTENTS

9.6 INVERTER STARTER

9.6.1 DESCRIPTION............................................................................9-17

9.6.2 MM2 SEQUENCES.....................................................................9-18

9.7 AUTOTRANSFORMER OPEN TRANSITION STARTER

9.7.1 DESCRIPTION............................................................................9-20

9.7.2 MM2 SEQUENCES.....................................................................9-21

9.8 AUTOTRANSFORMER CLOSED TRANSITION STARTER

9.8.1 DESCRIPTION............................................................................9-24

9.8.2 MM2 SEQUENCES.....................................................................9-25

9.9 PART WINDING STARTER

9.9.1 DESCRIPTION............................................................................9-28

9.9.2 MM2 SEQUENCE.......................................................................9-28

9.10 WYE-DELTA OPEN TRANSITION STARTER

9.10.1 DESCRIPTION............................................................................9-29

9.10.2 MM2 SEQUENCES.....................................................................9-30

9.11 WYE-DELTA CLOSED TRANSITION STARTER

9.11.1 DESCRIPTION............................................................................9-32

9.11.2 MM2 SEQUENCE.......................................................................9-33

9.12 DUTY/STANDBY STARTER

9.12.1 DESCRIPTION............................................................................9-35

9.12.2 MM2 SEQUENCES.....................................................................9-35

9.12.3 NOTES........................................................................................9-36

10.CONTROL WIRE APPLICATIONS

A. MM2 COMMISSIONING

9.13 SOFT STARTER

9.13.1 DESCRIPTION............................................................................9-38

9.13.2 MM2 SEQUENCE.......................................................................9-38

10.1 TWO WIRE CONTROL

10.1.1 DESCRIPTION......................................... ...................................10-1

10.1.2 CONTROL OPERATION ............................................................10-1

10.2 HAND/OFF/AUTO CONFIGURATION

10.2.1 2-WIRE HAND / 2-WIRE AUTO..................................................10-3

10.2.2 CONTROL OPERATION ............................................................10-3

10.2.3 3-WIRE HAND / 2-WIRE AUTO..................................................10-5

10.2.4 CONTROL OPERATION ............................................................10-5

10.2.5 3 WIRE HAND / 3 WIRE AUTO..................................................10-7

10.2.6 CONTROL OPERATION ............................................................10-7

10.3 HAND/AUTO CONFIGURATION

10.3.1 3-WIRE HAND / 2-WIRE AUTO..................................................10-9

A.1 COMMISIONING SUMMARY

A.1.1 DESCRIPTION......................... ....................................................A-1

B. MM2 FAQ

GE Power Management

B.1 MM2 FAQ

B.1.1 QUESTIONS AND ANSWERS....................................................B-1

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TABLE OF CONTENTS

C. DO’S AND DONT’S

D. ASYMMETRICAL

CURRENT

E. CT ISOLATION

F. FIGURES AND TABLES

G. MISCELLANEOUS

C.1 DO’S AND DONT’S

C.1.1 CHECKLIST.................................................................................C-1

D.1 ASYMMETRICAL CURRENT

D.1.1 OVERVIEW..................................................................................D-1

E.1 CT ISOLATION

E.1.1 MM2 CT WITHSTAND .................................................................E-1

E.1.2 CT SIZE AND SATURATION.......................................................E-1

F.1 LISTS

F.1.1 LIST OF FIGURES.......................................................................F-1

F.1.2 LIST OF TABLES......................................................................... F-2

G.1 EU DECLARATION OF CONFORMITY

0.1 GE POWER MANAGEMENT WARRANTY

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1 INTRODUCTION 1.1 OVERVIEW

1 INTRODUCTION

The MM2 combines control functions normally found in a low voltage motor control center (MCC) with motor protection. This compact, microprocessor-based device provides sophisticated control and protective relaying at significant cost savings over an MCC design using discrete devices.

Standard features in every MM2 simplify maintenance and plan t expans ion. One MM2 is requi red for every starter unit in the MCC. The contactor can be energized and de-energized using the MM2’s direct-wired inputs, or via the serial port. Full Voltage Non-reversing, Full Voltage Reversing, Two Speed, Autotransformer, Inverter, Wye-Delta, Slip Ring, and Part Winding type starters may be completely controlled by the MM2 using the two contactor outputs.

Motor protection is included for the most common causes of failure to prevent costly shutdowns and rewinds. These include 3 phase overload, stalled rotor, ground fault and loss of phase.

A two wire RS485 Modbus protocol communications port i s pro vid ed for high -spee d communicati ons with a complete line-up of MCCs. Any MM2 may be interrogated on demand, to determine both Actual and Setpoint operating parameters. Fast response time to a request for alarm or trip status makes real time control of a complete process possible. Statistical recording of running hours and number of starts and trips assists with predictive maintenance scheduling.

The MM2 has been developed with economy in mind. The customer is able to choose from different options to achieve maximum benefit from the relay when integrated into the process environment.

1.1 OVERVIEW 1.1.1 DESCRIPTION

1.1.2 FEATURES

The basic MM2 comes with 3 phase overload protection (49/51), single phase, 4 control inputs (Start, Stop, Local Isolator, Contactor A status) plus 2 programmable inputs. Depending upon which option is ordered, the following addit ional features are available:

•20×2 alphanumeric display (Option PD)

• 8 additional programmable inputs (Option 1)

• 2 additional electromechanical relays: Aux Relay 1 and Aux Relay 2 (Option 1)

• 4 to 20 mA process analog input (Option 1)

• programmable undervoltage restart of motors following an undervoltage condition (Option 1)

• diagnostics which includes pretrip data and historical statistics (Option 1)

• 2nd contactor control (wye/delta, two speed, reversing, etc.) which i n cludes all timers, relays and control inputs (Option 2)

• ground fault trips (50G/51G) (Optio n 2)

• stalled rotor protection (48) (Opt ion 2)

• single voltage input which allows the MM2 to calculate and display kW and kWh (Option 2)

• undercurrent/underpower protection (37) (Option 2)

• thermistor (49) input which accepts PTC and NTC thermistor types (Option 2)

• overvoltage (59) and undervoltage (27) protection (Option 2)

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MM2 Motor Manager 2 1-1

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1.2 ORDERING 1 INTRODUCTION

1.2 ORDERING 1.2.1 ORDER CODES

NOTE

This instruction manual describes the features of a MM2 with all options incl uded.

Table 1–1: SELECTION GUIDE

g g g g

1 | | Option 1: Process control, 10 process inputs, undervoltage

autorestart, diagnostics

2 | | Option 1: Enhanced protection, power (kW), thermistor, 2nd

contactor control, 2 process inputs 120 120 V AC Control Voltage 240 240 V AC Control Voltage

Base Unit Mounting

Option 1

Option 2

Power

MM2

MM2 | | | | Product Family

All models contain three phase overload protection (49/51), single phase, 4 control inputs (start, stop, local isolator, contactor A status), plus two programmable inputs and one output

NOTE

relay. The control voltage can be changed in the field.

a) MOUNTING

Chassis Mount: “Black box” version of the MM2 mounted inside the MCC starter. Panel Mount with Display: Mounted on a panel with a 20 × 2 display, LEDs, and keypad. This fea-

ture is only available with both options

b) OPTION 1

Process Control and Process Inputs: Incl udes 10 programmable switch inputs, 2 extra electrome-

chanical relays (Aux1 and Aux2), and a 4 to 20 mA input.

Undervoltage Auto-Restart: Programmable under voltage restart following undervoltage condition. Diagnostics: Alarms, pretrip data, and historical statistics about the motor or drive performance.

c) OPTION 2

2nd Contactor Control: Includes all timers, contactor A and B relays, and 2 programmable switch

inputs for two-contactor starter types such as wye/delta, two-speed, and reversing.

Enhanced Protection: Includes ground faul t, stalled rotor, and undercurrent protection. Power (kW): Includes a single VT input allowing for calculation of kW and kWhrs, as well as under-

power alarm.

Thermistor: Includes a thermistor i nput with alarm or trip sett ings for NTC and P TC type ther mistors.

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1 INTRODUCTION 1.2 ORDERING

1.2.2 ACCESSORIES

MM2PC RS-232/485: RS232 to RS485 converter box designed for harsh industrial envi ronments 5A Phase CT: 50,75,100,150,200,250,300,350,400,500,600,750,1000 1A Phase CT: 50,75,100,150,200,250,300,350,400,500,600,750,1000 50:0.025 Ground CT: For sensitive ground detection on high resistance grounded systems Collar: For reduced depth mounting

MOD601 – 240 V AC Switch Inputs: Allows use of external 240 VAC supply to power swi tch in puts . MOD602 – 24 to 48 V DC Switch Inputs: Allows use of external 24 to 48 V DC supply to power

switch inputs.

MOD603 – ESD Relay: Converts AUX Relay 2 into an Emergency Shutdown Relay. MOD605 – Removable Rear Terminals: Allows terminals 13 to 58 to be unplugged from the MM2. MOD610 – Conformal: Provides protect ion in harsh environments. MOD613 – 240 VAC VT Input: Allows 240 V AC to be applied to the VT input. MOD614 – 7200 VT Primary Setting: VT PRIMARY setpoint up to 7200 V and Variable Overload

Curve setting.

Software: Software package to aid in setting up MM2 operating parameters (free)

1.2.3 SPECIAL ORDER

MOD615 – 7200 VT Primary Setting: VT PRIMARY setpoint up to 7200 V and Backspin Timer.

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MM2 Motor Manager 2 1-3

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1.3 SPECIFICATIONS 1 INTRODUCTION

1.3 SPECIFICATIONS 1.3.1 MM2 SPECIFICATIONS

NOTE

Design and specifications are subject to change without notice.

PHASE CURRENT INPUTS

CONVERSION: true RMS, sample time 1.67ms RANGE: 0.1 to 8 × FULL SCALE: 8 × ACCURACY: ±2% of

PHASE CT PRIMARY AMPS

setpoint

setpoint or ±2% of reading, whichever is greater

GROUND FAULT CURRENT INPUT

CONVERSION: true RMS, sample time 1.67 ms RANGE: 0.1 to 1.0 ×

0.5 to 15.0 A (for 50:0.025 CT)

FULL SCALE: 1.5 ×

15 A (for 50:0.025 CT)

ACCURACY: for 5A CT: ±2% of full scale (5A CT)

for 50:0.025 CT: ±0.10 A (0.0 to 3.99 A)

G/F CT PRIMARY AMPS

±0.20 A (4.00 to 15.00 A)

setpoint (for 5 A secondary CT)

VOLTAGE INPUT / POWER READING

CONVERSION: true RMS, sample time 1.67ms VOLTAGE FULL SCALE: 1.5 × VT Primary VOLTAGE ACCURACY: ±2% of VT Primary or ±2% of reading, whichever is greater POWER ACCURACY: ±5% of nominal or ±5% of reading, whichever is greater INPUT VOLTAGE: Nominal: 120 V AC or 110 V AC

Maximum: 150 V AC

VT BURDEN: 0.01 VA

OVERLOAD CURVES

TRIP TIME ACCURACY: ±200 ms up to 10 seconds

±2% of trip time over 10 seconds

DETECTION LEVEL: ± 1% of primary CT amps

GROUND FAULT TRIP TIME

ACCURACY: –0 ms / +50 ms, 0.0 = less than 50 ms

ACCELERATION TIME

RANGE: 0.5 to 125 seconds or OFF ACCURACY: ±0.5 seconds

SINGLE PHASE

RANGE: greater than 30% U/B ACCURACY: ± 2 percentage points TRIP DELAY: 5 seconds ± 1 second

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1 INTRODUCTION 1.3 SPECIFICATIONS

–

IMI

CALCULATION METHOD: if

≥

where

= current in a phase with maximum deviation from

FLC

UB%

FLC

UB%

FLC

= average phase current

MOTOR FULL LOAD CURRENT

----------------------

–

IMI

----------------------

100%

setpoint

THERMAL COOLING TIMES

RANGE: 5 to 1080 min when motor is stopped;

50% of motor stopped value when motor is running.

ACCURACY: ± 1 minute

UNDERCURRENT

RANGE: 10 to 100% × motor FLC or OFF DELAY RANGE: 1 to 60 seconds ACCURACY: ±1 second

STALLED ROTOR

RANGE: 1.15 to 4.50 × FLC or OFF DELAY RANGE: 0.5 to 5 seconds ACCURACY: ±0.5 second

THERMISTOR INPUTS

SENSOR TYPES: positive temperature coefficient PTC;

negative temperature coefficient NTC; DELAY: 1 second ACCURACY: ±5% or 100 Ω (whichever is greater)

=100 to 30000

HOT

=100 to 30000

HOT

Ω

ANALOG INPUT

RANGE: 4 to 20 mA ACCURACY: ±1% of full scale ALARM: programmable 4 to 20 mA TRIP: programmable 4 to 20 mA

COMMUNICATIONS

TYPE: RS485 2 wire, half duplex BAUD RATE: 1200 to 19200 baud PROTOCOL: Modbus RTU FUNCTIONS: Read/write setpoints, Read coil status, Read actual values, Read device status,

Execute commands, Loopback Test

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1.3 SPECIFICATIONS 1 INTRODUCTION

MM2 CONTACTOR A & B AND AUX 2 OUTPUT RELAY CONTACTS

VOLTAGE BREAK MAKE/CARRY

30 V DC 10 A

RESISTIVE

INDUCTIVE (L/R = 7 ms)

RESISTIVE

INDUCTIVE (PF = 0.4)

CONFIGURATION: CONTACTOR A AND B: Form A

CONTACT MATERIAL: Silver Alloy (AgCdO) MAX. OPERATING VOLTAGE: 280 V AC, 250 V DC MAXIMUM PERMISSIBLE LOAD: 5 V DC, 100 mA

125 V DC 0.5 A 250 V DC 0.3 A

30 V DC 5 A 125 V DC 0.25 A 250 V DC 0.15 A 120 V AC

10 A

240 V AC 120 V AC 10 A 225 V AC 8 A

AUX RELAY 2: Form C

MM2 AUX 1 OUTPUT RELAY CONTACTS

CONTINUOUS

10 A 30 A

MAKE/CARRY

0.2 seconds

VOLTAGE BREAK MAKE/CARRY

CONTINUOUS

RESISTIVE

INDUCTIVE (L/R = 7 ms)

RESISTIVE

INDUCTIVE (PF = 0.4)

CONFIGURATION: Dual Form C CONTACT MATERIAL: Silver Alloy (AgCdO) MAX. OPERATING VOLTAGE: 280 V AC, 125 V DC

30 V DC 5 A 125 V DC 0.25 A

30 V DC 2.5 A 125 V DC 0.1 A

5 A 15 A

120 V AC

5 A

240 V AC 120 V AC 5 A 225 V AC 3 A

UNDERVOLTAGE – SUPPLY VOLTAGE

UNDERVOLTAGE: 65% of nominal (120 V AC or 240 V AC);

Immediate restart for maximum dip time of 0.1 to 0.5 seconds or OFF;

Delayed restart for maximum dip time of 0.1 to 10.0 seconds or UNLIMITED time DELAY RESTART RANGE: 0.2 to 300 seconds DELAY RESTART ACCURACY: ±0.2 seconds

MAKE/CARRY

0.2 seconds

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1 INTRODUCTION 1.3 SPECIFICATIONS

CT BURDEN

CT INPUT CURRENT BURDEN

VA OHMS

1 A 0.009

1 A PHASE CT

5 A PHASE CT

5 A GROUND CT

50:0.025 GROUND CT

20 A 3.5

5 A 0.04

100 A 16

5 A 0.04

100 A 17

0.025 A 0.07 116

0.1 A 1.19 119

0.5 A 30.5 122

0.015 A 0.2

0.00225 A 0.9

0.00225 A 1.1

CT WITHSTAND (1 A / 5 A PHASE CTs; 5 A GROUND CT)

CT INPUT 1 SEC 5 SEC CONTINUOUS

1 A PHASE CT

100 × CT 40 × CT 3 × CT5 A PHASE CT

5 A GROUND CT

CT WITHSTAND (50:0.025 A GROUND CT)

CONTINUOUS: 150 mA MAXIMUM: 12 A for 3 cycles

SUPPLY VOLTAGE

AC NOMINAL: 120 V AC, range 80 to 135 V AC

240 V AC, range 150 to 250 V AC FREQUENCY: 50/60 Hz POWER CONSUMPTION: 25 VA (maximum), 7 VA (nominal)

TYPE TESTS

TRANSIENTS: ANSI/IEEE C37.90.1 Oscillatory/Fast Risetime Transients

IEC 801-4 Electrical Fast Transient/Burst Requirements IMPULSE: IEC 255-5 5 kV Impulse Voltage Test RFI: 150 MHz, 450 MHz 5 W Handheld Transmitter at 25 cm ST ATIC: IEC 801-2 Electrostatic Discharge HI-POT: 1500 V, 1 minute; all inputs > 30 V

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1.3 SPECIFICATIONS 1 INTRODUCTION

ENVIRONMENT/GENERAL INFORMATION

POLLUTION DEGREE: 2

OVERVOLTAGE CATAGORY: 2 INSULATION VOLTAGE: 300 V OPERATING TEMPERATURE RANGE: 0°C to 60°C DUST & MOISTURE RATING: NEMA Type 12 and 12K IP CLASS: IEC 529 - IP53

WEIGHT

MAX WEIGHT: 4 lbs. (1.8 kg) SHIPPING BOX SI ZE: 8.30” (211 mm) × 5.625” (143 mm) × 5.80” (147 mm)

FUSE TYPE/RATING

0.5 A; 250 V Fast Blow, High breaking capacity

INSTALLATION

WARNING: HAZARD may result if the product is not used for its intended purpose VENILATION REQUIREMENTS: None CLEANING REQUIREMENTS:None

CERTIFICATION/COMPLIANCE

CE: IEC 947-1,IEC 1010-1 CSA: Approved File No. LR41286 UL: Recognized File No. E83849 QUALITY ASSURANCE SYSTEM: Registered by QMI to CSA CAN3.Z299.3-1985 & ISO 9001-1994

NOTE

It is recommended that all MM2 relays are powered up at least once per year to avoid deterioration of electrolytic capacitors in the power supply.

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2 INSTALLATION 2.1 MOUNTING

2 INSTALLATION

Cut the panel as shown below to mount the MM2. Use either the #8-32 or #6×½” mounting screws provided to mount the MM2 to the panel.

2.1 MOUNTING 2.1.1 DESCRIPTION

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Figure 2–1: MM2 MOUNTING INSTRUCTIONS

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2.1 MOUNTING 2 INSTALLATION

The dimensions for the standard MM2 and the MM2 with reduced mounting collar are shown below:

Figure 2–2: MM2 DIMENSIONS

Figure 2–3: MM2 WITH DEPTH REDUCTION COLLAR DIMENSIONS

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2 INSTALLATION 2.1 MOUNTING

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Figure 2–4: TYPICAL WIRING DIAGRAM

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2.1 MOUNTING 2 INSTALLATION

480 VOLT BUS480 VOLT BUS

FUSEFUSE

CONTCONTACTACTOROR

PHASE PTPHASE PT

PHASE CTPHASE CT

GROUND CTGROUND CT

THERMISTOR

MOTOR

WINDINGWINDING

THERMISTTHERMISTOROR

LOAD

CONTACTOR ACONTACTOR A

(FOR(FORWARD/WYE)ARD/WYE)

CONTACTOR BCONTACTOR B

(REVERSE/DEL(REVERSE/DELTA)

51 49 37

51G

MOTOR

MANAGER 2MANAGER 2

AUXAUX

RELARELAY

AUXAUX

RELARELAY

CONTROLCONTROL

INPUTSINPUTS

4-20mA4-20mA

INPUTINPUT

RS485 REMOTERS485 REMOTE COMMUNICACOMMUNICATIONTION 1200-19K2 BAUD1200-19K2 BAUD

PROCESSPROCESS

PLC ORPLC

TRANSDUCERTRANSDUCER

Figure 2–5: MM2 FUNCTIONAL BLOCK DIAGRAM

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2 INSTALLATION 2.2 INPUTS AND OUTPUTS

2.2 INPUTS AND OUTPUTS 2.2.1 PHASE CT INPUTS

Both 5 A and 1 A current transformer secondaries are accommodated by the MM2. Each phase current input to the MM2 has 3 terminals: 5 A input, 1 A input, and the common input. For example, if th e phase CTs are 200:5, connect phase 1, 2, and 3 CT secondaries to terminals 1/3, 4/6, and 7/9, respectively. For motor full-load currents up to 10 A, the phase conductors can be direct connected to the MM2 with no phase CTs required providing that the voltage at the CT terminals does not exceed 600 V RMS.

CTs should be selected to be capable of supplying the required current to the total secondary load which includes the MM2 relay burden of 0.1 VA at rated secondary current and the connection wiring burden. The CT must not saturate under maximum current conditions which can be up to 8 times motor full load during starting.

2.2.2 GROUND FAULT CT INPUT

The ground CT has a 5 A input, a 50:0.025 input, and a common input. The 5 A input on the ground CT is used for 5 A secondary CTs or for residual connection of phase CTs. Residual ground fault protection provides a sensitivity of 5% of motor Phase CT Primary. The 50:0.025 core balance (zerosequence) CT input can be used for improved sensitivity when measuring the ground fault current.

Care must be taken when turning ON the Ground Fault Trip feature. If the interrupting device (contactor or circ uit breaker ) is not ra ted to break gro und f ault c urr ent (l ow r esist ance

NOTE

Supply voltage of 120/240 V AC, 50 or 60 Hz, is required to power t he MM2. T he label on the back o f the unit will specify the voltage which has been internally set inside the MM2. To change the voltage setting, open the sliding door on the back of the MM2 and locate the supply voltage selector slide switch. The selector slide switc h has a label af fixed to show t he 120/240 VAC positions. Set the slide switch to the desired voltage.

This is an additional ground terminal provided for dissipating transient signals and surges. This must be connected by a thick wire or braid to the system gro und for reliable operation.

Signal wiring is to box terminals that can accommodate wire as large as 12 gauge. CT connections are made using #8 screw ring terminals that can accept wire as large as 8 gauge. Consult Figure 2– 4: TYPICAL WIRING DIAGRAM on page 2–3. Other features can be wired as required.

or solidly grounded systems), the feature should be disabled. The 50:025 input is only recommended to be used on resistance grounded systems. Where the system is solidly grounded or high levels of current are to be detected use the 5 A ground input.

2.2.3 SUPPLY VOLTAGE

2.2.4 GROUND SURGE

2.2.5 EXTERNAL CONNECTIONS

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2.2 INPUTS AND OUTPUTS 2 INSTALLATION

2.2.6 THERMISTOR INPUT

Either a Positive Temperature Coefficient (PTC) or Negative Temperature Coefficient (NTC) thermistor may be directly connected to the MM2. By specifying the hot and cold thermistor resistance, the MM2 automatically determines the thermistor type as NTC or PTC. Use thermistors with hot and cold resistance values in the range 100 to 30000Ω. If no thermistor is connected, the thermistor alarm and trip detection must be set to DISABLE in the S1: CONFIGURATION \ THERMISTOR page.

2.2.7 ANALOG INPUT

The analog input accepts an input from a standard 4 to 20 mA source. This input can be used for process control monitoring to provide status and/or alarm and tripping signals related to the level of the input signal. The analog input messages (S3: PROCESS \ ANALOG INPUT) can be programmed to show a user defined name and units.

2.2.8 AUX 2 COIL

The AUX Relay 2 can be internally energized by the MM2 or externally energized by applying a 24 V DC signal to these terminals. Correct polarity is requir ed (Terminal 21 = +24 V DC, Terminal 22 = 0 V DC).

2.2.9 OUTPUT RELAYS

There are up to 4 output relays on t he MM2. Contact s witching ra ting fo r the output r elays as well can be found in Section 1.3: SPECIFICATIONS on page 1–4.

• Contactor A Relay (34/35): non-reversing, forward, low speed, etc.

• Contactor B Relay (32/33): reversing, high speed, etc.

• AUX Relay 1 (26/27/28, 29/30/31): field programmable

• AUX Relay 2 (23/24/25): field programmable or hard-wired 24 V DC coil

2.2.10 SWITCH INPUTS

SWITCH INPUT COMMON TERMINALS 57 AND 58 ARE LIVE 120 VAC.

CAUTION

All switch inputs are opto-isolated and operate at a voltage of 120 V AC. The switch will read closed when 120 VAC is applied to the switch terminal. This 120 V AC can be supplied from the switch common terminals (57, 58) or from an external source providing that the source is in phase with the supply voltage of the MM2.

2.2.11 PROGRAMMABLE SWITCH INPUTS

These 10 inputs can be programmed to one of a number of differ ent funct ions. Some of th e availabl e functions are: Setpoint Access, Lockout Reset, Plant Interlock, Auto Start, Remote Permissive, and Test. See the S3: PROCESS \ PROGRAMMABLE INPUTS page for complete list of available functions.

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2 INSTALLATION 2.2 INPUTS AND OUTPUTS

2.2.12 SERIAL COMMUNICA TION PORT

A serial port provides communication capabilities to the MM2. Multiple MM2s can be connected together with a 24 AWG stranded, shielded twisted pair with a characteristic impedance of 120 such as Belden 9841 or equivalent. The total length of communications wiring should not exceed 4000 feet. Care should be used when routing the communications wiring to keep away from high power AC lines and other sources of electrical noise.

Correct polarity is essential for the communications port to operate. Terminal 39 ("+") of every MM2 in a serial communication link must be connected together. Similarly, Terminal 40 ("–") of every MM2 must also be connected together. The shield wire must be connected to Terminal 38 (485 SERIAL GROUND) on every unit in the link to provide a common ground potential for all units. Each relay should be "daisy chained" to the next one. Avoid star or stub connected configurations if possible to avoid potential communication problems.

A terminating resistor and capacitor network is required to prevent communication errors. Only the last MM2 and the master computer driver should have the terminating network to ensure proper matching. Using terminating resistors and capacitors on all the MM2s would load down the communication network while omitting them at the ends could cause reflections resulting in communication errors.

Ω

Figure 2–6: RS485 TERMINATION

2.2.13 STOP

If this terminal is de-energized, both contactor A and contactor B output relays will open causing the contactor coils to de-energize. The stop input must be energized before the MM2 will process any start commands.

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2.2 INPUTS AND OUTPUTS 2 INSTALLATION

2.2.14 START A / START B

When the start input terminals are energized, the corresponding contactor output relay will be energized provided all other valid start conditions are met. If any trip occurs, both contactor outputs will be de-energized. Start A input is used for all types of contactors, that is: Full Voltage Non-reversing, Reversing, Two Speed (low speed), Wye Delta Open Trans iti on, Inver ter, Slip Ring, Autotransformer, Part Winding or Wye Delta Closed Transition. Start B input is used for Reversing and Two Speed

(high speed) contactor control. Start inputs are usually momentary unless Two Wire control is selected. Start A and B commands may also be initiated via the seri al link.

2.2.15 LOCAL ISOLATOR N/O

The local isolator NO auxi liar y c ontacts are used to pr event motor star ts i n t he event of t he Local Iso lator being in the “open” position. To prevent starts, the MM2 produces a trip when the Local Isolator input is open. A Local Isolator Trip is automatically reset when the Local Isolator is re-closed. The Local Isolator input can be enabled or disabled as required. The factory default is disabled.

2.2.16 CONTACTOR STATUS

The MM2 must know the state of the contactor at all times in order to detect discr epancies in contac tor close/open commands and also to display the state of the contactor. There are two contactor status inputs on the MM2, one for contactor A, the other for contactor B.

Auxiliary contacts mechanically linked to the contactor itself are used to feed back to the contactor status inputs. No status change following a "start" command indicates an open contactor control circuit and no status change following "stop" command indicates a welded contactor. Appropriate messages and alarms are displayed for these conditions and the status can be read via the serial port.

If the motor contactor is externally energized, the MM2 will seal in the output relay and display an “EXTERNAL START” message. If the motor contactor is externally de-energized, the MM2 will drop out the output relay and display an “EXTERNAL STOP” message.

2.2.17 SWITCH COMMON

These two terminals serve as the common for all switches. The MM2 switch inputs operate at 120 VAC which is supplied from these terminals.

2.2.18 DIELECTRIC STRENGTH TESTING

It may be required to test a complete MCC with MM2s installed for dielectric strength. This is also known as "flash" or "hi-pot" testing. The MM2 is rated for 1500 V AC for 1 minute or 1800 VAC for 1 second isolation between switch inputs, relay outputs, VT voltage input, supply voltage inputs and ground terminal 13.

When performing dielectric test s, the connect ion to t he sur ge ground t erminal (14) must b e removed . A filter network is used on the AC input to filter out RF and EMI noise. The filter capacitors and transient absorbers could be damaged by the high voltages relative to surge ground on the AC input.

Under no circumstances should any inputs other than switches, relays, supply voltage, VT input, and CT inputs be dielectric tested.

WARNING

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3 HARDWARE 3.1 FACEPLATE FUNCTIONS

3 HARDWARE

3.1 FACEPLATE FUNCTIONS 3.1.1 DESCRIPTION

Once the MM2 has been wired and powered on, it is ready to be programmed for a specific application. Local programming is done using the front panel keypad and the 40 character alphanumeric display. Remote programming via the serial port is also possible using the MM2PC

software.

3.1.2 MESSAGE DISPLAY

A 40 character display is used to communicate all information about the syste m to the user. Trip and alarm messages will automatically override the currently-displayed message. If no key is pressed for 2 minutes, a user-selected default messaging sequence will be displayed. If the motor is currently stopped, the Motor Status message will be the default message. Once the motor is started, the first user-selected message will appear.

RUNNING

STOPPED

TRIPPED

ALARM

FAULT

START AAUTO

MANUAL START B

STOP

SETPOINT

MESSAGE

ACTUAL

RESET

VALUE

STORE

Figure 3–1: FRONT PANEL

CONTACTOR A

CONTACTOR B

AUX 1

AUX 2

807230A1.CDR

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3.1 FACEPLATE FUNCTIONS 3 HARDWARE

3.1.3 INDICATOR LEDs

• RUNNING: Whenever contactor A and/or B relays are closed and the contactor status inputs acknowledge the correct state, the RUNNING indicator will be on. Current flow does not affect the indicator, only contactor status.

• STOPPED: If both contactors A and B are in the OFF state, the STOPPED indicator will be on.

• TRIPPED: If a trip condition causes the A or B contactor relays to de-energize, this indicator will be on. As long as this indicator is on, the motor cannot be started. It is cleared using the reset key, lockout reset facility or serial port reset, dependent on the type of trip.

• ALARM: If an alarm condition is present this indicator will be on. Use the A2: ALARM DATA actual

values to view current alarm status.

• FAULT: If an internal fault within the MM2 is detected by self-checking, this indicator will be on. The MM2 must be replaced or repaired.

• CONTACTOR A: If the Contactor A Relay is energized, this indicator will be on.

• CONTACTOR B: If the Contactor B Relay is energized, this indicator will be on.

• AUX 1: If Auxiliary Relay # 1 is on, this indicator will be on.

• AUX 2: If Auxiliary Relay # 2 is on, this indicator will be on.

• AUTO: If the MM2 is in Auto control mode or the Hard-Wired Auto mode, this indicator will be on. In Auto mode the Start A / Start B switch inputs and START A / START B keypad keys are nonoperational but serial port st art commands are operati onal. In the Hardwir ed Auto Mode, the Auto Start A and Auto Start B switch inputs are functional in conjunction with the Auto Permissive switch input. Serial, faceplate and remote starts are disabled. STOP commands from any location are always operational.

• MANUAL: If the MM2 is in Manual control mode, this indicator will be on. In Manual mode the Start A / Start B switch inputs, AUTO START A / AUTO START B switch inputs and START A / START B keypad keys are operational but serial port start commands are ignored. All stop commands are operational.

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3 HARDWARE 3.2 KEYPAD

3.2 KEYPAD 3.2.1 SETPOINTS KEY

FUNCTION: The SETPOINT key allows the user to examine and alter all trip, alarm, and other MM2

setpoints. There are 6 pages of Setpoints:

• Page 1: Configuration

• Page 2: Protection

• Page 3: Process

• Page 4: Control

• Page 5: Monitoring

• Page 6: Factory Data EFFECT: Pressing this key will cause the display to show the beginni ng of the next page of setpoints

data. If Actual Values data was on the disp lay bef ore pressing th e SETPOINT k ey, setpoints page S1 will be shown:

]] SETPOINTS ]] S1: CONFIGURATION

USE: This key can be pressed at any time to view MM2 setpoints. To scroll through the setpoint pages, press the SETPOINT key. To go from section to section within a page, press the MESSAGE UP and MESSAGE DOWN keys. To go from line to line within a section, press the MESSAGE LEFT and MESSAGE RIGHT keys.

To alter a setpoint, the VALUE UP and VALUE DOWN keys can be used. All setpoints can be incremented or decremented to pre-determined limits. When the desired value is reached, the STORE key must be used to save the n ew set point. If an a lt ered set poin t is n ot s tored, the previous val ue will still be in effect. All control and protection features continue to operate while setpoints data is displayed.

3.2.2 ACTUAL VALUES KEY

FUNCTION: The ACTUAL key allows the user to examine all of the actual motor operating parame-

ters. There are 4 pages of ACTUAL VALUES data:

• Page 1: Data

• Page 2: Status

• Page 3: Inputs

• Page 4: Statistics EFFECT: Pressing this key will cause the display to show the beginning of the next page of Actual

Values data. If setpoints data was on th e displ ay befor e pressin g t he ACTUAL key, page A1 of Actual Values will be shown:

]] ACTUAL VALUES ]] A1: DATA

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3.2 KEYPAD 3 HARDWARE

USE: This key can be pressed at any time to view MM2 actual values. To scroll through the actual

values pages, press the ACTUAL key. To go from section to section within a page, press the MESSAGE UP and MESSAGE DOWN keys. To go from line to line within a section, press the MESSAGE LEFT and MESSAGE RIGHT keys.

The VALUE UP and VALUE DOWN keys have no effect when actual values data is displayed.

3.2.3 STORE KEY

FUNCTION: The STORE key allows the user to store new setpoints into th e MM2 internal memory. EFFECT: When this key is pressed the currently displayed Setpoint will be stored in non-volatile

memory and will immediately come into effect. When a Setpoint is stored, the following flash mes-

sage will appear on the display:

NEW SETPOINT

STORED

USE: The STORE key can be used only in SETPOINTS mode to store new setpoints, or in ACTUAL VALUES mode to select a new default message.

3.2.4 STOP KEY

FUNCTION: The STOP key will allow the user to stop the motor from the face plate of the MM2. EFFECT: Pressing this key will cause the Contactor A and Contactor B output relays to de-energize

therefore dropping out the motor contactor.

USE: The STOP key is used to stop the motor.

3.2.5 RESET KEY

FUNCTION: The RESET key allows the user to reset MM2 trips. EFFECT: Pressing this key will reset a tri pped stat e on the MM2. A message i ndicati ng that a r eset i s

not possible will be displayed if the condition causing the trip is still present. USE: The RESET key can be used to reset all trip conditions from the faceplate of the MM2. A

Ground Fault, Stalled Rotor and Overload Trip can be assigned to the LOCKOUT RESET feature on one of the programmable switch inputs for adde d safety. The factory default allows the resetting of all trips using the front panel reset key.

3.2.6 START A KEY

FUNCTION: The START A key can be used to start the motor. EFFECT: Pressing this key will cause the programmed start sequence to begi n. USE: The START A key is used to sta rt the motor from the faceplate of the MM2. Start A can also be

initiated from the start switch inputs at the back of the MM2 or from the serial port.

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3 HARDWARE 3.2 KEYPAD

3.2.7 START B KEY

FUNCTION: The START B key can be used to start the motor. EFFECT: Pressing this key will cause the programmed start sequence to begi n. USE: This START B key is used to start a reversing or two speed motor from the faceplate of the

MM2. Start B can also be initiated from the start switch input at the back of the MM2 or from the serial port.

3.2.8 MESSAGE UP/DOWN KEYS

FUNCTION: The MESSAGE UP and MESSAGE DOWN keys allow the user to move to the next or

previous section of the currently selected page. EFFECT: Pressing the MESSAGE DOWN key will cause the display to move to the next section of

the current page. Pressing the MESSAGE UP key will cause the display to move to th e previous section of the current page. Note: If either key is held for more than 1 second, the next or previous sections will be selected at a fas t rate. When the c urrent display is a t a page heading, t he MESSAGE UP key has no effect. When the curr ent displ ay is at t he end of the page, the MESSAGE DOWN key has no effect.

USE: These keys are used to move through the sections of the currently selected page.

3.2.9 MESSAGE LEFT/RIGHT KEYS

FUNCTION: The MESSAGE LEFT and MESSAGE RIGHT keys allow the user to scan the next or

previous line of the currently selected section. EFFECT: Pressing the MESSAGE RIGHT key displays the next line of the current section. Pressing

the MESSAGE LEFT key displays the previous line of the current section. If either key is held for more than 1 second, the next or previous line will be selected at a faster rate. If the display shows a section heading, the MESSAGE LEFT key has no effect. If the MESSAGE RIGHT key has no effect, the display is showing the last line of a section.

USE: These keys are used to move through the lines of the currently selected sect ion.

3.2.10 VALUE UP/DOWN KEYS

FUNCTION: The VALUE UP and VALUE DOWN keys allow the user to change setpoint values prior

to pressing the STORE key. EFFECT: Pressing the VALUE UP key will increment the currently displayed setpoint value. Pressing

the VALUE DOWN key will decrement the currently displayed setpoint value. If the display shows an Actual Value these keys will have no effect

USE: These keys can be used any time to change the value displayed in the setpoint messages.

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3.3 THEORY OF OPERATION 3 HARDWARE

3.3 THEORY OF OPERATION 3.3.1 HARDWARE DESCRIPTION

A 16 bit 68HC16 microc ontroller IC performs program execution and control logic for the MM2. Refer to the block diagram for a complete overview of the MM2 circuitry. It has an 8 or 16 bit bus width which can be selected dynamically with each external memory fetch allowing a mix of 8 and 16 bit devices. Internal clock rate is 16 Mhz. Instructions are stored in two 128K×8 bit flash memory, data is stored in an 32K×8 RAM while Setpoints and accumulated data are stored in a 8K×8 EEPROM.

An intelligent display module with its own microprocessor, memory and command set is accessed through a buffer on the data bus. The display, a 4×4 keypad and the front panel LEDs are multiplexed through the same buffer.

External switch inputs ar e driven with 120 VAC whi ch triggers an optocoupler for isolation. All control

logic based on the state of these inputs determines operation of up to 4 output relays which are also driven from a latch under program control. Like the inputs, the relay outputs are driven from an isolated power supply and optocoupler to prevent switch ing transient energy from affecting the CPU.

A 10 bit successive approximation A/D on the 68HC16 CPU with 8 channels is used to measure all analog signals. Separate AC inp uts for phase 1 , phase 2, phase 3, and g round f ault sig nals are sampled at a 1.67 ms rate, squared and summed. RMS current is then determined by deriving the square root of the sampled waveform over several cycles. The sampling time is set to measure an integral number of cycles to reduce the affects of noise and harmonics. Thermistor, analog input, VT voltage, control supply voltage and internal reference voltage are also monitored. An external precision 5V DC reference is used as the input reference for the A/D converter.

When power to the unit is removed, a small 8-bit processor (68HC705) will continue to operate for a period of at least 1 hour. This processor is powered from a large backup capacitor. The 68HC705 accurately measures the time that the MM2 has been without control power. When power is reapplied the main processor will read the time off from the small processor and then very accurately calculate the thermal capaci ty value. This time off value is also used for the undervoltage restart feature.

Serial communications at up to 19200 baud is implemented with UART circuitry internal to the 68HC16 microcomputer. All necessary timing and control is performed inside the chip. An external transceiver chip converts the digital data to an RS485 interface. Direction, receive data and transmit data are on the input side with a two wire twisted pair driver on the output.

AC control voltage to power the MM2 can be selected as 120 or 240 V AC using a switch and dual wound primary transformer. A filter is incorporated between the incoming supply and transformer primary to prevent transients from affecting the circuitry.

Separate, isolated secondary supplies are used for CPU power, I/O and communication drivers. Optocoupling and transformer coupling are used between isolated circuits to prevent transients from upsetting program execution. The 68HC705 is used to provide separate watchdog timer and power fail monitoring control to ensure that the main CPU starts and operates under any input voltage conditions. Should normal program execution fail, the 68HC705 reset s the main CPU.

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3 HARDWARE 3.3 THEORY OF OPERATION

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Figure 3–2: BLOCK DIAGRAM

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3.3 THEORY OF OPERATION 3 HARDWARE

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4 SETPOINTS 4.1 OVERVIEW

4 SETPOINTS

4.1 OVERVIEW 4.1.1 DESCRIPTION

By pressing the SETPOINT key, any of the motor trip/alarm Setpoints may be viewed or altered. Setpoints data is divi ded into si x pages. I nformati on a bout the conf ig urati on of t he mot or as wel l as othe r connected devices is entered in page one, S1: CONFIGURATION. Information for programming the protection features is located in page two, S2: PROTECTION. Information describing the process control functions is described in page three, S3: PROCESS. Information for programming the cont rol functions in the MM2 is contained in page four, S4: CONTROL. Information to aid with plant maintenance is contained in page five, S5: MONITORING. Information about the internal configuration of the MM2 as well as the software version is contained in page, S6: FACTORY DATA.

To scroll through the Setpoint pages, press the SETPOINT key. When this key is pressed for the first time the following message will appear on the display:

]] SETPOINTS ]] S1: CONFIGURATION

This is the first page of Setpoints. The MESSAGE RIGHT, MESSAGE LEFT, MESSAGE UP and MESSAGE DOWN keys may be used to view all of the setpoints data.

The Setpoint values themselves are changed by pressing the VALUE UP or VALUE DOWN keys until the desired value is reached. When a Setpoint is adjusted to its proper value the STORE key must be pressed in order to store the Setpoint into the MM2 non-volatile memory. Once the STORE key is pressed the flash mess age shown below will appear on the displa y and the new Setpo int value will be permanently saved.

NEW SETPOINT

STORED

Setpoints may be changed while the motor is running; however it is not recommended to change important protection parameters without first stopping the motor.

WARNING

Setpoints will remain stored indefinitely in the MM2 internal non-volatile memory even when control power to the unit is removed. Protection parameters are based on the entered data. This data must be complete and accurate for the given system for reliable protection and operation of the motor.

All Setpoint messages shown contain the factory defaul t settings.

NOTE

4.1.2 ABBREVIATIONS

The following abbreviations are used in the messages in the setpoints pages.

• A, AMPS: Amperes

• AUX: Auxilia ry

• CBCT: Core Balance Current Transformer

• COM, COMMS: Communication

• CT: Current Transformer

• FLC: Full Load Current

• FV: Full Voltage

• G/F: Ground Fault

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4.1 OVERVIEW 4 SETPOINTS

• GND: Ground

•Hz: Hertz

• KOHMS: kiloOhms

• MAX: Maximum

• MIN: Minim um

• SEC, s: Seconds

• UV: Undervoltage

• VT: Voltage Transformer

]] SETPOINTS ]] S1: CONFIGURATION

] COMMUNICATION ]

] MOTOR ] IDENTIFICATION

] STARTER ]

] CT/VT INPUTS ]

] THERMISTOR ]

] FAULT MODE ]

] STATISTICS ]

] PROGRAMMABLE ] MESSAGES

]] SETPOINTS ]] S2: PROTECTION

] MOTOR PROTECTION ] THERMAL

] MOTOR PROTECTION ] GROUND FAULT

] MOTOR PROTECTION ] OPTIONS

] LOAD PROTECTION ]

] UNDER/OVERVOLTAGE ] PROTECTION

]] SETPOINTS ]] S3: PROCESS

] PROGRAMMABLE ] INPUTS

] PROCESS INTERLOCK ] NAMES

] STOP CONFIGURATION ]

] ANALOG INPUT ]

]] SETPOINTS ]] S4: CONTROL

] UNDERVOLTAGE ] AUTO RESTART

] AUX RELAY 1 CONFIG ]

] AUX RELAY 2 CONFIG ]

] PREFERENCES ]

]] SETPOINTS ]] S5: MONITORING

] PLANT CONDITION ]

] PRESET COUNTERS ] AND TIMERS

Figure 4–1: SETPOINTS MESSAGES

4-2 MM2 Motor Manager 2

]] SETPOINTS ]] S6: FACTORY DATA

] PRODUCT FIRMWARE ] IDENTIFICATION

] PRODUCT MODEL ] IDENTIFICATION

] FACTORY SEVICE ] DATA

GE Power Management

Page 37

4 SETPOINTS 4.2 S1 CONFIGURATION

4.2 S1 CONFIGURATION 4.2.1 DESCRIPTION

This page is used to enter all information about the configuration of the MM2 and the motor being protected by the MM2. Setpoints Page 1 is divided into eight sections, COMMUNICATIONS, MOTOR IDENTIFICATION, STARTER, CT / VT INPUTS, THERMISTOR, FAULT MODE, STATISTICS, PROGRAMMABLE MESSAGE and PREFERENCES.

4.2.2 COMMUNICATIONS

P ATH: SETPOINTS t S1: CONFIGURATION t COMMUNICATIONS

COMMUNICATIONS ADDRESS: OFF

BAUD RATE: 9600

PARITY: NONE

P ATH: SETPOINTS t S1 CONFIGURATION tt MOTOR IDENTIFICATION

MOTOR NAME: MOTOR

MOTOR RATING

OFF kW

HIGH SPEED MOTOR RATING: OFF kW

SYSTEM SUPPLY:

480 V

Range: 1 to 255 or OFF, Step: 1

Each MM2 on the same serial communication network must have a unique address in the range of 1 to 255. Computer software driving the serial network must be configured to recognize each separate address.

Range: 1200, 2400, 4800, 9600, 19200

Selects the data transfer rate for Modbus serial communications.

Range: NONE, ODD, EVEN

This setpoint determines what type of parity checking is used when communicating to the MM2.

Range: 20 ASCII characters

Enter a motor name that will appear in the actual values message A1: DATA \ MOTOR DATA \ MOTOR STATUS.

Range: 0.3 kW to 1100 kW or OFF; Step: 0.1 kW

Enter the motor rating (or low speed motor rating for two speed starters) in kWs on this line. This message is for reference only and does not affect operation of the MM2.

Range: 0.3 kW to1100 kW or OFF, Step: 0.1 kW

Enter the high speed motor rating (applicable for Two Speed starters only) in kWs on this line. This message is for reference only and does not affect operation of the MM2.

Range: 110 V to 600 V; Step: 1 V

Enter system supply voltage on this line. This message is for reference only and does not affect operation of the MM2.

4.2.3 MOTOR IDENTIFICATION

GE Power Management

MM2 Motor Manager 2 4-3

Page 38

4.2 S1 CONFIGURATION 4 SETPOINTS

4.2.4 STARTER

PATH: SETPOINTS t S1: CONFIGURATION

STARTER TYPE: OFF

CHANGE OVER CURRENT

1.5 xFLC

CHANGE OVER TIME:

30 s

TRANSFER TIME:

10 s

HIGH SPEED START BLOCK: DISABLE

RAMP UP TIME:

5 s

RAMP DOWN TIME:

5 s

STAGE ONE SHORTING TIME: 5 s

STARTER

ttt

Range: OFF, FV NON-REVERSING, FV REVERSING, WYE DELTA

OPN TRANS, TWO SPEED, INVERTER, SLIP RING, AUTOTRANS OPN TRANS, PART WINDING, WYE DELTA CLS TRANS, AUTOTRANS CLS TRANS, DUTY/STANDBY, SOFT STARTER, WYE DELTA OPN TRANS

Select a type according to the configuration that the MM2 is controlling. This will determine the control logic used for Contactor A and Contactor B start and stop sequences. See Chapter 9: STARTER TYPES for a detailed description of each starter type.

Range: 1.0 to 5.0 x FLC or OFF; Step: 0.1 x FLC

Appears only when STARTER TYPE is WYE DELTA OPN TRNS or WYE DELTA CLS TRANS. Before CHANGE OVER CURRENT comes into effect on a wye delta start, a minimum of 25% of the CHANGE OVER TIME must have expired. After 25% of the time has expired and the average of the three phase currents has dropped below the CHANGE OVER CURRENT value, the transition from wye (Contactor A) to delta (Contactor B) will occur. If this setpoint is OFF, 100% of the CHANGE OVER TIME must expire for the wye to delta transition to occur.

RANGE: 1 to 100 seconds; Step: 1 second

Appears only if STARTER TYPE is set a s WYE DELTA OPN TRNS or WYE DELTA CLS TRANS. See CHANGE OVER CURRENT setpoint above for operation.

Range: 1 to 125 seconds; Step: 1 second

Appears only if STARTER TYPE is set as FV REVERSING or TWO SPEED. With two-speed starters, this delay is required when the motor is switched from high speed (Contactor B) to low speed (Contactor A). The delay starts when Contactor B drops out. With a reversing starter, this delay occurs when switching from forward (Contactor A) to reverse (Contactor B) and from reverse to forward.

Range: ENABLE, DISABLE

Appears only if STARTER TYPE is TWO SPEED. When disabled, the MM2 allows the motor to be started directly to high speed. When enabled, the motor must be started in low speed before switching to high speed.

Range: 1 to 125 seconds; Step: 1 second

Appears only if STARTER TYPE is selected as INVERTER. See the descrip- tion of the Inverter starter type for details on functionality.

Range: 1 to 125 seconds; Step: 1 second

Appears only if STARTER TYPE is selected as INVERTER. See the descrip- tion of the Inverter starter type for details on functionality.

Range: 1 to 125 seconds; Step: 1 second

Appears only if STARTER TYPE is SLIP RING or PART WINDING. This is the time delay from the closure of Contac tor A to the closure of Contactor B.

4-4 MM2 Motor Manager 2

GE Power Management

Page 39

4 SETPOINTS 4.2 S1 CONFIGURATION

CONTACTOR SEQUENCE:

1S-2S

CHANGE OVER TIME: 5 s

STARTS PER HOUR:

P ATH: SETPOINTS t S1: CONFIGURATION

PHASE CT PRIMARY AMPS: 100

HIGH SPEED PHASE CT PRIMARY AMPS: 100

GROUND FAULT CT INPUT:50:0.025 CBCT

GROUND CT PRIMARY AMPS: 100

50:0.025 HI-RES DISPLAY: DISABLE

VT PRIMARY VOLTAGE: OFF V

Range: 1S-2S, 2S-1S

Appears only if STARTER TYPE is AUTOTRANS OPN TRANS. The 1S-2S value closes the 1S contactor ahead of the 2S contactor as per some manufacturer wiring practices. The 2S-1S value means that the 2S contactor will close ahead of the 1S contactor, another common wiring practice.

Range: 1 to 125 seconds; Step: 1 second

Appears only if STARTER TYPE is AUTOTRANS OPN TRANS or AUTOTRANS CLS TRANS. This is the time delay from the closure of Contactor A until the opening of Contactor A.

Range: 1 to 40 starts/hour or OFF; Step: 1

Limits the number of starts per hour to prevent over heating of windings.

Range: 5 to 1000 A; Step: 5 A

Enter the phase CT rated primary amps; e.g. if the phase CTs are rated 500:5, enter 500. The CT secondary must be connected to the correct input, i.e. 1 A or 5 A.

Range: 5 to 1000 A; Step: 5 A

Appears only if STARTER TYPE is TWO SPEED. Enter the high speed CT rated primary amps. In effect only when Contactor B is energized.

Range: 50:0.025 CBCT, 5 A SEC CBCT, 5 A RESIDUAL

Enter the ground sensing used, either sensitive 50:0.025 core balanced ground fault CT, 5 A sec. core balanced CT, or 5 A Residual for residual ground fault current sensing from the 5 A phase CT secondaries.

Range: 5 to 1000 A; Step: 5 A

Appears only if 5A SEC CBCT is selected for the GROUND FAULT CT INPUT. Enter the GFCT rated primary amps.

Range: Enable, Disable

Increases the displayed resolution to 2 decimal points for the 50:0.025 ground input.

Range: 110 to 600 V or OFF; Step: 1 V

Enables/disables the voltage/power feat ures and sets VT primary volts.

tttt

4.2.5 CT / VT INPUTS

CT/VT INPUTS

VT CONNECTION TYPE: PHASE (A-N)

VT SECONDARY VOLTAGE: 120V

NOMINAL FREQUENCY: 60 Hz

GE Power Management

Range: PHASE (A-N), LINE (A-B)

Appears only if the VT PRIMARY VOLTAGE setpoint is not set to OFF. Enter the type of VT connection: PHASE A-N (V

) or LINE A-B (Vab).

Range: 110 V, 120 V

Appears only if the VT PRIMARY VOLTAGE setpoint is not set to OFF.

Range: 50 Hz, 60 Hz

MM2 Motor Manager 2 4-5

Page 40

4.2 S1 CONFIGURATION 4 SETPOINTS

4.2.6 THERMISTOR

PATH: SETPOINTS t S1: CONFIGURATION

COLD RESISTANCE:

0.1 kOHMS

HOT RESISTANCE

5.0 kOHMS

THERMISTOR TRIP: DISABLE

THERMISTOR ALARM: DISABLE

ttttt

THERMISTOR

Range: 0.1 to 30.0 kOHMS; Step: 0.1

For a PTC thermistor, enter the resistance that the thermistor must drop below before a Thermistor T r ip or Alar m can be cl eared. For a NTC ther mistor, enter the resistance that the thermistor must rise above before a Thermistor Tri p or Alarm can be cleared.

Range: 0.1 to 30.0 kOhms, STEP: 0.1

For a PTC thermistor, enter the resistance that the thermistor must rise above before a Thermistor Trip or Alarm will occur. For a NTC thermistor, enter the resistance that the thermistor must drop below before a Thermistor Tri p or Alarm will occur.

Range: ENABLE, DISABLE

When a thermistor is used, it can be selected for an Alarm or Trip or both. Choose ENABLE to allow Thermistor Trips to occur .

Range: ENABLE, DISABLE

When a thermistor is used, it can be selected for an Alarm or Trip or both. Choose ENABLE to allow Thermistor Alarms to occur.

4.2.7 FAULT MODE

PATH: SETPOINTS t S1: CONFIGURATION

INTERNAL FAULT TRIP ENABLE

Range: ENABLE, DISABLE

An internal fault during self-checking will cause an alarm. Since operation may be erratic depending on the fault condition, it may be desirable to trip the motor by set ting t his setpoi nt t o ENABLE. The MM2 continues to run the motor with an internal fault present if set to DISABLE.

SERIAL COMM FAILURE TRIP: OFF s

Range: 5 to 25 seconds or OFF; Step: 5 seconds

If using serial communications to control a process with several motors working together, it may be desirable to shut down the motor if communication control is lost. When no activity occurs on the communications port for 5 to 25 seconds, it will trip if this feature is enabled.

SERIAL COMM FAILURE ALARM: OFF

CHANGE COMMAND MODE ON ALARM: DISABLE

Range: 5 to 25 seconds or OFF; Step: 5 seconds

Sets an alarm when the serial communication link is interrupted.

Range: ENABLE, DISABLE

Allows the command mode to automatically switch from AUTO to MANUAL when the SERIAL COMMS FAILURE ALARM is active. If th e motor was running when the alarm occurred it will be st opped and wil l resta rt b ased on manual start inputs only. When serial communication is restored the MM2 will remain in MANUAL command mode.

tttttt

FAULT MODE

4-6 MM2 Motor Manager 2

GE Power Management

Page 41

4 SETPOINTS 4.2 S1 CONFIGURATION

4.2.8 STATISTICS

P ATH: SETPOINTS t S1: CONFIGURATION

CLEAR TIMERS: DISABLE

Range: ENABLE, DISABLE

Select ENABLE and press STORE to clear the timers on page A4: STATISTICS \ TIMERS.

CLEAR START/TRIP COUNTERS: DISABLE

Range: ENABLE, DISABLE

Select ENABLE and press STORE to clear the start and trip counters on page A4: STATISTICS \ COUNTERS.

CLEAR INTERLOCK COUNTER: DISABLE

Range: ENABLE, DISABLE

Select ENABLE and press STORE to clear the interlock counter on page A4: STATISTICS \ COUNTERS.

CLEAR ENERGY USED: DISABLE

Range: ENABLE, DISABLE

Select ENABLE and press STORE to clear the energy used (kWhrs) on page A1: DATA \ MOTOR DATA.

P ATH: SETPOINTS t S1: CONFIGURATION

PROGRAMMABLE MESSAGE SAMPLE TEXT

Range: 40 ASCII characters

Enter a 40 character message using the VALUE UP/DOWN and STORE keys. Message is displayed in A1: PROGRAMMABLE MESSAGE.

ttttttt

tttttttt

STATISTICS

4.2.9 PROGRAMMABLE MESSAGE

PROGRAMMABLE MESSAGE

P ATH: SETPOINTS t S1: CONFIGURATION

DEFAULT MESSAGE DELAY: 10 s

DEFAULT MESSAGE BRIGHTNESS: 60%

Range: 3 to 120 seconds in steps of 1

The default message delay can now be adjusted with this setpoint.

Range: 0 to 100% in steps of 20

The display brightness can now be adjusted when it is not in use.

ttttttttt

4.2.10 PREFERENCES

PREFERENCES

GE Power Management

MM2 Motor Manager 2 4-7

Page 42

4.3 S2 PROTECTION 4 SETPOINTS

4.3 S2 PROTECTION 4.3.1 DESCRIPTION

This page is used to enter all information about the protection of the motor and the load. Setpoints Page 2 is divided into four sections, MOTOR PROTECTION THERMAL, MOTOR PROTECTION GROUND FAULT, MOTOR PROTECTION OPTIONS, LOAD PROTECTION and UNDER/OVERVOLTAGE PROTECTION.

4.3.2 STANDARD OVERLOAD CURVES

Table 4–1: STANDARD OVERLOAD CURVE TRIP TIMES (IN SECONDS)

OVERLOAD

LEVEL

1.05 7200 7200 7200 7200 7200 7682 10243 12804

1.10 416 833 1250 1666 2916 3750 5000 6250

1.20 198 397 596 795 1392 1789 2386 2982

1.30 126 253 380 507 887 1141 1521 1902

1.40 91 182 273 364 638 820 1093 1367

1.50 70 140 210 280 490 630 840 1050

1.75 42 84 127 169 297 381 509 636

2.00 29 58 87 116 204 262 350 437

2.25 21 43 64 86 150 193 258 323

2.50 16 33 50 66 116 150 200 250

2.75 13 26 39 53 93 119 159 199

3.00 10 21 32 43 76 98 131 164

3.50 7.8152331546993116

4.00 5.811172340526987

1 2 3 4 5 6 7 8

CURVE NUMBER

4.50 4.5 9 13 18 31 40 54 68

5.00 3.6 7.2 10 14 25 32 43 54

5.50 3 6 9 12 20 26 35 44

6.00 2.557.51017223037

6.50 2.1 4.2 6.3 8.4 14 19 25 31

7.00 1.8 3.6 5.4 7.2 12 16 21 27

7.50 1.6 3.2 4.8 6.4 11 14 19 23

8.00 1.4 2.8 4.2 5.6 9.8 12 16 20

The standard overload curves are shown in the following chart. Note that K+E 11” x 17” format of time/overcurrent curves are available from factory upon request.

4-8 MM2 Motor Manager 2

GE Power Management

Page 43

4 SETPOINTS 4.3 S2 PROTECTION

MM2/MM3 STANDARD TIME/CURRENT

OVERLOAD CURVES

GE POWER MANAGEMENT

100000

10000

1000

TIME (SECONDS)

100

CURVE #CURVE #

.05

Figure 4–2: GE POWER MANAGEMENT TIME/OVERCURRENT CURVES

GE Power Management

0.1

0.5

456

789

MULTIPLE OF PICKUP CURRENT (PER UNIT)

MM2 Motor Manager 2 4-9

807638D4.CDR

100

Page 44

4.3 S2 PROTECTION 4 SETPOINTS

4.3.3 NEMA COMPATIBLE OVERLOAD CURVES

Table 4–2: NEMA COMPATIBLE OVERLOAD CURVE TRIP TIMES (IN SECONDS)

OVERLOAD

LEVEL

1.05 3349 5024 6698 10047

1.10 1635 2452 3269 4904

1.20 780 1170 1560 2340

1.30 497 746 995 1492

1.40 358 536 715 1073

1.50 275 412 549 824

1.75 166 250 333 499

2.00 114 172 229 343

2.25 84 127 169 253

2.50 65 98 131 196

2.75 52 78 105 157

3.00 43 64 86 129

3.50 30 46 61 91

4.00 23 34 46 67

CLASS 10 CLASS 15 CLASS 20 CLASS 30

CURVE

4.50 17.8 27 36 53

5.00 14.3 21 29 43

5.50 11.7 17.6 23 35

6.00 9.8 14.7 19.6 29.4

6.50 8.3 12.4 16.6 24.9

7.00 7.1 10.7 14.3 21.4

7.50 6.2 9.3 12.4 18.6

8.00 5.4 8.1 10.9 16.3

The NEMA compatible overload curves are shown in the following chart. Note that K+E 11” x 17” format of time/overcurrent curves are available from factory upon request.

4-10 MM2 Motor Manager 2

GE Power Management

Page 45

4 SETPOINTS 4.3 S2 PROTECTION

GE POWER MANAGEMENT

100000

10000

1000

MM2/MM3 NEMA COMPATIBLE TIME/CURRENT

OVERLOAD CURVES

TIME (SECONDS)

100

CURVE #CURVE #

CLASS 30CLASS 30

789

CLASS 20CLASS 20

CLASS 15CLASS 15

CLASS 10CLASS 10

0.1

0.5

456

MULTIPLE OF PICKUP CURRENT (PER UNIT)

Figure 4–3: NEMA COMPATIBLE TIME/OVERCURRENT CURVES

807903D4.CDR

100

GE Power Management

MM2 Motor Manager 2 4-11

Page 46

4.3 S2 PROTECTION 4 SETPOINTS

4.3.4 MOTOR PROTECTION – THERMAL

PATH: SETPOINTS

FULL LOAD CURRENT:

100 A

HIGH SPEED FULL LOAD CURRENT: 100 A

OVERLOAD PICKUP LEVEL: 1.00

OVERLOAD CURVE NUMBER: 4

HOT/COLD CURVE RATIO: 75

S2 PROTECTION t MOTOR PROTECTION THERMAL

Range: 5 to 1000 A or OFF, Step 1, for

0.5 to 100.0 A or OFF, Step 0.1, for

Usually the rated current on the motor nameplate is entered as the full load current value. A lower value effectively overprotects the motor. It is not advisable to enter a value higher than the motor nameplate rating. When the actual motor current exceeds this value, the thermal capacity starts to be used up and the motor will eventually trip according to the overload curve selected.

Range: 5 to 1000 A or OFF, Step 1, for

0.5 to 100.0 A or OFF, Step 0.1, for

This setpoint functions the same way as FULL LOAD CURRENT, but refers to the high speed FLC of a two-speed motor, and is only in effect while contactor B is energized.

Range: 1.00 to 1.25; Step: 0.01 This setpoint dictates where the overload curve begins as the motor

enters an overload condition. Thi s is useful for servi ce fact or motor s as i t allows the pickup level to be defined. The curve is effectively cut off at current values below this pickup.

Range: 1 to 8, CLASS 10, CLASS 15, CLASS 20, CLASS 30 Select 1 of 12 different

I2t

time-overcurrent overload curves. Consult the

overload curve figures and tables in this manual (see pages 4–34 to 4–

37) to match the curve number to a particular motor. If no motor curve data is available, select the curve which has a 6 times overload trip time equal to the motor nameplate stall time. The MM2 also has four NEMA class curves which can be selected should these curves be suggested by the manufacturer.

Range: 20 to 100%; Step: 1% Defines the ratio of motor "hot" thermal characteristic to the motor "cold"

characteristic. It is used to thermally model the heating in the motor when running at or below full load current. This is often determined from motor thermal damage curves or Locked Rotor Time Hot and Locked Rotor Time Cold data. HOT/COLD CURVE RATIO determines the thermal capacity used when a motor has run at its full load current long enough for the motor temperature to reach its steady state value, which is defined as the hot temperature. Note that the thermal capacity used is reduced according to the actual motor current.

CT PRIMARY

> 50 A

≤ 50 A

> 50 A

≤ 50 A

For example, given the followi ng motor information: motor FLC = 100 A, actual motor c u rrent = 80 A, LRT Hot = 7 seconds, and LRT Cold = 10 seconds, the thermal capacity used can be determined from the HOT/COLD CURVE RATIO as follows:

HOT/COLD CURVE RATIO

===

------------------------ -

LRT Cold

100

LRT Hot

4-12 MM2 Motor Manager 2

7 sec.

-------------------

10 sec.

100×70%

GE Power Management

Page 47

4 SETPOINTS 4.3 S2 PROTECTION

Therefore:

Thermal Capacity Used

actual motor current

-----------------------------------------------------

FULL LOAD CURRENT

80 A

--------------- -

100 A

100% 70%

()×

–

100%

24%

–

HOT/COLD CURVE RATIO

4.3.5 MOTOR PROTECTION – GROUND FAULT

P ATH: SETPOINTS tt S2: PROTECTION tt MOTOR PROTECTION GROUND FAULT

Care must be taken when turning ON the GROUND FAULT TRIP feature. If the interrupting device (contactor or circuit breaker) is not rated to break ground fault current (low

NOTE

resistance or solidly grounded systems), the feature should be disabled. Alternately, the feature may be assigned to an auxiliary relay and connected such that it trips an upstream device that is capable of breaking the fault current. Be aware that the MM2 will energize the auxiliary relay and de-energize contactor A at the same time when the ground fault trip occurs. Unless a contactor trip delay setting has been chosen (see AUX RELAY 1 CONFIG for details).

A change has been made in the way the MM2 calculates the 5A G/F alarm and tri p lev els. On all software revisions prior to 3.30, the levels are based upon a percentage of

NOTE

FULL LOAD CURRENT. From software revisions 3.30 and up, the levels are based on a percentage of CT PRIMARY.

GROUND FAULT ALARM LEVEL: OFF %CT

Range: 3 to 100% CT or OFF; Step: 1%

This message will appear if the GROUND FAULT CT INPUT is set to 5A SEC CBCT or 5A RESIDUAL. Set the GROUND FAULT ALARM LEVEL to some arbi- trary amount below the GROUND FAULT TRIP LEVEL to get an early warning of insulation breakdown. For maximum sensitivity, the value selected

should be just high enough to prevent nuisance alarms. If the 5A SEC CBCT value is selected, the level is calculated as a percentage of the G/F

CT PRIMARY setting; if the 5A RESIDUAL value is selected, the level is cal- culated as a percentage of the PHASE CT PRIMARY setting.

GROUND FAULT ALARM LEVEL: OFF A

Range: 0.5 to 15.0 A or OFF; Step: 0.5 A

This message will appear if the Ground Fault CT Input is set to 50:0.025 CBCT. See GROUND FAULT ALARM LEVEL (%CT) above for details.

GROUND FAULT ALARM DELAY ON RUN: 10 s

Range: 1 to 60 seconds; Step: 1 second

This delay is used when the motor is in a RUNNING condition. If the ground current is equal to or above the GROUND PRIMARY ALARM PICKUP setpoint value and remains this way for the time delay programmed in this setpoint while the motor is running, the alarm relay will activate and the GROUND ALARM message will be displayed.

GE Power Management

When the phase current increases from 0, the GROUND ALARM DELAY ON START setpoint below is used until the MM2

NOTE

determines whether the motor is RUNNING or STARTING.

Refer to the ACCELERATION TIME setpoint in Section 4.3.7: LOAD PRO- TECTION for details on how the MM2 detects a start condition.

MM2 Motor Manager 2 4-13

Page 48

4.3 S2 PROTECTION 4 SETPOINTS

GROUND FAULT ALARM: DLY ON START: 10 s

GROUND FAULT TRIP LEVEL: OFF %CT

GROUND FAULT TRIP LEVEL: OFF A

GROUND FAULT TRIP DELAY ON RUN: 1.0 s

Range: 1 to 60 seconds; Step: 1 second

This delay is used when the motor is in a STARTING condition. If the ground current is equal to or above the GROUND PRIMARY ALARM PICKUP setpoint value and remains this way for the time delay programmed in this setpoint while the motor is starting, the alarm relay will activate and the GROUND ALARM message will be displayed.

When the phase current increases from 0, this delay is used until the MM2 determines whether the motor is RUN-

NOTE

Refer to the ACCELERATION TIME setpoint in Section 4.3.7: LOAD PRO- TECTION for details on how the MM2 detects a start condition.

NING or STARTING.

Range: 3 to 100% CT or OFF; Step: 1%

This message will appear if the GROUND FAULT CT INPUT is set to 5A SEC CBCT or 5A RESIDUAL. Some leakage current will always flow between the 3 phases and ground due to capacitance, insulation, resistance, etc. On resistance limited ground sys tems, the value selected must be below the maximum resistance limited current that can flow or a trip will never occur . If no optimum value is known, monitor actual leakage current then enter a current somewhat above this value. Ground Fault Trips at a later time would indicate a deterioration in the system and insulation integrity should be verified. Persistent, high values of leakage current pose a threat to personnel and equipment and should not be left unchecked. If the 5A CBCT RESIDUAL value is selected, the level is calculated as a per- centage of the G/F CT PRIMARY setting; if the 5A RESIDUAL value is selected, the level i s calcu lated as a perce ntage of the PHASE CT PRIMARY setting.

Range: 0.5 to 15.0 A, “0.5 A MAX”, or OFF; Step: 0.5 A This message will appear if the Ground Fault CT Input is set to 50:0.025

CBCT. See description for GROUND FAULT TRIP LEVEL (%CT) for details. When set to 0.5 A MAX, the MM2 will trip at less

Range: 0.0 to 10.0 seconds; Step: 0.1 second This delay is used when the motor is in a RUNNING condition. If the

ground current is equal to or above the GROUND PRIMARY TRIP PICKUP setpoint value and remains this way for the time delay programmed in this setpoint while the moto r is r unni ng, the assigned r el ay(s) wi ll activat e and the CAUSE OF TRIP: GROUND FAULT message will be displayed.

than 0.5 A.

When the phase current increases from 0 A, the GROUND TRIP DELAY ON START setpoint below is used until the MM2

NOTE

Refer to the ACCELERATION TIME setpoint in Section 4.3.7: LOAD PRO- TECTION for details on how the MM2 detects a start condition.

determines whether the motor is RUNNING or STARTING.

4-14 MM2 Motor Manager 2

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Page 49

4 SETPOINTS 4.3 S2 PROTECTION

GROUND FAULT TRIP DLY ON START: 1.0s

Range: 0.0 to 10.0 seconds; Step: 0.1 second This delay is used when the motor is in a STARTING condition. If the

ground current is equal to or above the GROUND PRIMARY TRIP PICKUP setpoint value and remains this way for the time delay programmed in this setpoint while the moto r is star ting, the ass igned rel ay(s ) will activat e and the CAUSE OF TRIP: GROUND FAULT message will be displayed.

NOTE

Refer to the ACCELERATION TIME setpoint in Section 4.3.7: LOAD PROTECTION for details on how the MM2 detects a start condition.

P ATH: SETPOINTS tt S2: PROTECTION

MINIMIZE RESET TIME: ENABLE

Range: ENABLE, DISABLE

The MM2 measures the motor thermal capacity used during a start. This data can be used to minimize the lockout time following an Overload Trip. This allows the motor to be restarted after it has cooled to a safe starting temperature. When set to DISABLE, the lockout time after an Overload Trip will be the time required for the thermal memory to reduce to 15%.

When the phase current increases from 0, this delay is used until the MM2 determines whether the motor is RUNNING or STARTING.

4.3.6 MOTOR PROTECTION – OPTIONS

MOTOR PROTECTION OPTIONS

ttt

STOPPED MOTOR COOL TIME: 30 MINUTES

For example, if the thermal capacity used during the previous start is 40%, then after an occurrence of an Overload Trip, a RESET can be accomplished when the thermal capacity decreases to 58% as shown:

100% – TC used during start – 2% Safety Margin = 100% – 40% – 2% = 58%

Range: 5 to 1080 minutes; Step: 1 minute The STOPPED MOTOR COOL TIME determines how long it takes for a

stopped motor to reach steady state ambient temperature f rom its maximum allowable temperature. The maximum allowable temperature occurs when the thermal capacity used reaches 100% (e.g. at the occurrence of an Overload Trip). The Thermal Capacity value will decrease exponentially to model the cooling characteristic of the motor. The STOPPED MOTOR COOL TIME thus represents the time for the thermal capacity value to decay through 5 time constants. Note that an Overload Trip can normally be reset when the thermal capacity value decreases to 15%.

GE Power Management

MM2 Motor Manager 2 4-15

Page 50

4.3 S2 PROTECTION 4 SETPOINTS

For example, given: Maximum Thermal Capacity = 100% (Overload Trip)

STOPPED MOTOR COOL TIME = 30 minutes The time to reach 15% Thermal Capacity Used can be calculated by:

⁄–

Thermal Capacity 100

Therefore, the time that must pass until the Thermal Capacity reaches 15% can be calculated as shown:

⁄–

⇒

---

0.15

–

()

⇒

0.15ln

–== =

OVERLOAD TRIP RESET: MANUAL

Thermal Capacity 100 15 100

⇒

11.4 minutes

⁄–

⇒

0.15

Range: MANUAL, AUTO

If this Setpoi nt is set to AUTO, an automatic reset of Overload Trips will occur after the motor has cooled to a thermal capacity value below 15%. When set to MANUAL, the keypad RESET key must be pressed to reset the trip after the motor has cooled to a thermal capacity value below 15%.

RESET LOCKOUT USING RESET KEY: ENABLE

Range: ENABLE, DISABLE

If this setpoint is set to ENABLE, the RESET key on the faceplate of the MM2 will reset all trips providing that the trip condition is not still present. When set to DISABLE, the RESET key on the faceplate will not reset the three lockout trips (Overload, Ground Fault, and Locked Rotor); one of the interlock inputs will have to be used to reset these three trips. Note: when the “Lockout Reset” function is configured, the RESET key will no longer be able to reset the three lockout tri ps.

PHASE UNBALANCE ALARM: ENABLE

Range: ENABLE, DISABLE

When an unbalance in phase currents exceeds the internally set threshold, an alarm condition will be generated if this value is set to ENABLE. The internal threshold is 15% and the unbalance must be above this threshold for at least 5 seconds for the alarm to occur.

THERMAL CAPACITY ALARM: OFF %

Range: 1 to 100% or OFF; Step: 1

When the thermal capacity used exceeds the level set, an alarm will be generated. This alarm can be assigned to a dedicated AUX Relay if desired.

OPEN CONTROL CIRCUIT TRIP: ENABLE

Range: ENABLE, DISABLE

In two-wire control applications where a constant start signal is provided, the MM2 should be configured to trip on an open control circuit. An Open Control Circuit occurs when feedback on Contactor Status (terminal 55) stays open when a start op erat io n is execut ed. Th is c ondition may occur if a control wiring problem develops or because of an AUX contact failure. The OPEN CONTROL CIRCUIT TRIP feature should be used in conjunction with the RESET ALARMS USING RESET KEY function.

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4 SETPOINTS 4.3 S2 PROTECTION

RESET ALARMS USING RESET KEY: ENABLE

P ATH: SETPOINTS tt S2: PROTECTION

UNDERPOWER ALARM LEVEL: OFF kW

UNDERPOWER ALARM DELAY: 10 s

UNDERPOWER TRIP LEVEL: OFF kW

UNDERPOWER TRIP DELAY: 10 s

ACCELERATION TIME ALARM: OFF s

ACCELERATION TIME TRIP: OFF s

LOAD INCREASE ALARM:

OFF %FLC

Range: ENABLE, DISABLE The MM2 will now allow the Acceleration Alarm, Open Control Circuit

Alarm, Motor Greasing, Contactor Inspection and Motor Stopped Time Alarms to be reset using the Faceplate Reset Key. All other alarms will reset when the Alarm condition clears.

Range: 0.2 to 1100.0 kW or OFF; Step: 0.1 kW

Appears if VT PRIMARY VOLTAGE is not set to OFF. This feature functions the same as the Underpower Trip feature but produces an alarm indication instead of a trip.

Range: 1 to 60 seconds; Step: 1 second

Appears if VT PRIMARY VOLTAGE and UNDERPOWER ALARM LEVEL are not set to OFF. Enter a delay for activation of the Underpower Alarm.

Range: 0.2 to 1100.0 kW or OFF; Step: 0.1 kW

Appears if VT PRIMARY VOLTAGE is not set to OFF. For applications such as pumps, the Underpower Trip feature or the Undercurrent Trip feature can be selected to detect loss of load. The advantage of the Underpower Trip feature is that it allows for more accurate sensing if the loss of load results in only a small change in cur re nt and a power fact or s hift . If the power remains below this value while the motor is running for the time specified in UNDERPOWER TRIP DELAY, the MM2 will trip. Set this value to OFF if no Underpower Trip is required.

Range: 1 to 60 seconds; Step: 1 second

Appears if VT PRIMARY VOLTAGE and UNDERPOWER TRIP LEVEL are not se t to OFF. Set the UNDERPOWER TRIP DELAY long enough to prevent nui- sance trips from momentary power dips.

Range: 0.5 to 125.0 seconds or OFF; Step: 0.5 second

Enter a time longer than the actual acceleration time of the motor. This is defined as the length of time required for the avera ge motor current to drop below Full Load Current after a start command.

Range: 0.5 to 125.0 seconds or OFF; Step: 0.5 second

Enter the maximum allowable acceleration time of the motor. This is defined as the length of time required for the average motor current to drop below Full Load Current after a start command.

Range: 20 to 130% FLC or OFF; Step: 1% FLC

Set to a suitable level if a warning is required when motor current is approaching, or in, an overload condition. When current exceeds this value, a Load Increase Alarm will occur. Set to OFF if not required.

tttt

4.3.7 LOAD PROTECTION

LOAD PROTECTION

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4.3 S2 PROTECTION 4 SETPOINTS

UNDERCURRENT ALARM LEVEL: OFF %FLC

UNDERCURRENT ALARM DELAY: 10 s

UNDERCURRENT TRIP: LEVEL: OFF %FLC

UNDERCURRENT TRIP DELAY: 10 s

STALLED ROTOR TRIP LEVEL: 4.50 xFLC

STALLED ROTOR TRIP DELAY: 3.0 s

Range: 10 to 100% FLC or OFF; Step: 1% FLC

This feature functions the same as the Undercurrent Trip feature but produces an alarm indication instead of a trip.

Range: 1 to 60 seconds; Step: 1 second

Enter the delay for activation of the Under current Alarm.

Range: 10 to 100% FLC or OFF; Step: 1% FLC

For applications such as pumps an Undercurrent Trip can be selected. If the current remains below t h is value while the motor is running for the time specified in the UNDERCURRENT TRIP DELAY, the MM2 will trip. Set this value to OFF if no Undercurrent Trip is required.

Range: 1 to 60 seconds; Step: 1 second

Set the UNDERCURRENT TRIP DELAY long enough to prevent nuisance trips from momentary current di ps when t he Under current Trip feature is used.

Range: 1.15 to 4.50 x FLC or OFF; Step: 0.05 x FLC

Mechanical equipment such as pumps or fans can be quickly damaged if it jams, resulting in a locked rotor stall. Even though the motor may be able to withstand the locked rotor for a longer time, it may be desirable to trip the motor quickly as soon as the stall condition occurs. The MM2 will trip when the running current exceeds this value after the Stalled Rotor Time. Set this value to OFF if stall protection of driven equipment is not required since the thermal overload protection will protect the motor . This feature is defeated during the inrush of motor starting.

Range: 0.5 to 5.0 seconds; Step: 0.5 seconds

If the STALLED ROTOR TRIP LEVEL is set to a value other than OFF, the MM2 will trip after the time specified by this setpoint.

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4 SETPOINTS 4.3 S2 PROTECTION

4.3.8 UNDER/OVERVOLTAGE PROTECTION

P ATH: SETPOINTS tt S2: PROTECTION

UNDERVOLTAGE ALARM LEVEL: OFF V

UNDERVOLTAGE ALARM DELAY: 10 s

UNDERVOLTAGE TRIP LEVEL: OFF V

UNDERVOLTAGE TRIP DELAY: 10 s

OVERVOLTAGE ALARM LEVEL: OFF V

OVERVOLTAGE ALARM DELAY: 10 s

OVERVOLTAGE TRIP LEVEL: OFF V

OVERVOLTAGE TRIP DELAY: 10 s

Range: 0 to 600 V or OFF; Step: 1 V

Appears if VT PRIMARY VOLTAGE is not set to OFF. This feature functions the same as the Undervoltage Trip feature but produces an alarm indication instead of a trip.

Range: 1 to 60 seconds; Step: 1 second

Appears if VT PRIMARY VOLTAGE is not set to OFF. Enter the delay for acti- vation of the Undervoltage Alarm.

Range: 0 to 600 V or OFF; Step: 1 V

Appears if VT PRIMARY VOLTAGE is not set to OFF. If the voltage remains below this value while the motor is running for the time specified in the UNDERVOLTAGE TRIP DELAY, the MM2 will trip. Set this value to OFF if no Undervoltage Trip is required.

Range: 1 to 60 seconds; Step: 1 second

Appears if VT PRIMARY VOLTAGE is not set to OFF. Set th e UNDERVOLTAGE TRI P DELAY long enough to prevent nuisance trips from momentary voltage dips when the Undervoltage Trip feature is used.

Range: 0 to 600 V or OFF; Step: 1 V

Appears if VT PRIMARY VOLTAGE is not set to OFF. This feature functions the same as the Overvoltage Trip feature but produces an alarm indication instead of a trip.

Range: 1 to 60 seconds; Step: 1 second

Appears if VT PRIMARY VOLTAGE is not set to OFF. Enter the delay for acti- vation of the Overvoltage Alarm.

Range: 0 to 600 V or OFF; Step: 1 V

Appears if VT PRIMARY VOLTAGE is not set to OFF. If the voltage remains above this value while the motor is running for the time specified in the OVERVOLTAGE TRIP DELAY, the MM2 will trip. Set this value to OFF if no Overvoltage Trip is required.

Range: 1 to 60 seconds; Step: 1 second

Appears if VT PRIMARY VOLTAGE is not set to OFF. Set the OVERVOLTAGE TRI P DELAY long enough to prevent nuisance trips from momentary voltage dips when the Undervoltage Trip feature is used.

ttttt

UNDER/OVERVOLTAGE PROTECTION

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4.4 S3 PROCESS 4 SETPOINTS

4.4 S3 PROCESS 4.4.1 DESCRIPTION

This page is used to enter all process information. Setpoints Page 3 is divided into four sections, PROGRAMMABLE INPUTS, INTERLOCK NAMES, FIELD STOP and ANALOG INPUT.

4.4.2 PROGRAMMABLE INPUTS

PATH: SETPOINTS

The first five messages are repeated for all ten interlock outputs.

NOTE

INTERLOCK INPUT 1: NOT USED

STARTUP OVERRIDE DELAY: 0 s

RUNNING OVERRIDE DELAY: 0 s

OPERATION: INTERLOCK STOP

INSTANTANEOUS ALARM: DISABLE

IL1 SWITCH TYPE: N.O.

LOCAL ISOLATOR: DISABLE

S3: PROCESS t PROGRAMMABLE INPUTS

ttt

Range: NOT USED, PROCESS INTERLOCK A to PROCESS INTERLOCK J, PLANT INTERLOCK, LOCKOUT RESET, SETPOINT ACCESS, AUTO PERMISSIVE, AUTO START A, AUTO START B, RESET EMERGENCY STOP TRIP, RESET UNDERCURRENT TRIP, TWO WIRE CONTROL, TEST SWITCH, REMOTE PERMISSIVE, COMMUNICA TIONS SELECT, INTERLOCK COUNTER, AUX RELAY 1 INHIBIT, WYE-DELTA 1M CONTACT, WYE-DELTA 2S CONTACT, U/ V RESTART INHIBIT, AUTOTRANS 2S CONTACT, STOP A, STOP B, REMOTE RESET, MOTOR SELECTOR A/B, DUTY SELECT MANUAL/AUTO, BYPASS CONTACT

Note that interlock input functions are act ive when the applicabl e switch input is closed and energized. See the following page for explanation of the range options.

Range: 0 to 3600 seconds or OFF; Step: 1 second

See PROCESS INTERLOCK A.

Range: 0 to 3600 seconds or OFF; Step: 1 second

See PROCESS INTERLOCK A.

Range: INTERLOCK STOP, LATCHED TRIP

See PROCESS INTERLOCK A.

Range: ENABLE, DISABLE

See PROCESS INTERLOCK A.

Range: N.O., N.C.

This setpoint allows the user t o conf igure t he type of swit ch used for t he programmable switch inputs as normally open (N.O.) or normally closed (N.C.). When set to N.O. (f actory def ault), if the switch input is clo sed, it i s in the ‘healthy’ position; if the swit ch i s open, it is in the ‘ unheal thy’ pos ition. When set to N.C., if the switch input is open, it is in the ‘healthy’ position; if it is closed, it is in the ‘unhealthy’ position.

Range: ENABLE, DISABLE The Local Isolator switch input can be enabled or disabled using this

Setpoint. When set to ENABLE a Local Isolator Trip will occur whenever the Local Isolator switch input is open. The trip will automatically reset when the switch input is closed.

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4 SETPOINTS 4.4 S3 PROCESS

AUTO PERMISSIVE INDICATION: MANUAL

AUTO MODE = SERIAL

SERIAL PERMISSIVE: DISABLE

START BLOCK ALARM: DISABLE

DISABLE COMMAND MODE CHANGE WHEN RUNNING

Interlock input functions are active when the applicable switch input is closed and energized.

NOTE

Range: MANUAL, AUTO

Range: SERIAL, HARD-WIRED

Range: ENABLE, DISABLE

Allows serial commands to block all start commands (serial or manual) until the unblock command is received. This setpoint must be enabled before serial start block commands are executed. When set to DISABLE, any start blocks in effect are automatically unblocked. The START BLOCK ALARM setpoint can be used to indicate when a start was attempted while a block was in effect.

Range: ENABLE, DISABLE

This setpoint allows the active command mode to be changed while the motor is running. When set to DISABLE, the motor must first be stopped before the command mode can be changed (Auto or Manual).

The MM2 has 10 programmable switch inputs. Each input can have one of many functions assigned to it. Once a function is assi gned to one Inter loc k input, that f unctio n cannot be assigne d to any other Interlock input. The Inter lock functions are:

• NOT USED: This is stored if this Interlock switch input is not used.

• PROCESS INTERLOCK A-J: The Process Interlock functions are used to provide time depen-

dent trip / alarm / stop features based on a switch input. This function is used together with the STARTUP OVERRIDE DELAY, RUNNING OVERRIDE DELAY, OPERATION, and INSTANTANEOUS ALARM set- points. The STARTUP OVERRIDE switch can remain open on the occurrence of a motor start. If the switch remains unhealthy for longer than this time, a Process Interlock Trip or Process Interlock Stop will occur. If the Startup Override Delay is set to 0 the Process Interlock switch must be healthy in order for the MM2 to allow the motor to start. If the Startup Override Delay is set to OFF this timer is disabled. The RUNNING OVERRIDE DELAY setpoint sets the amount of time that the Process interlock switch can be unhealthy during normal running. If the Process Interlock switch goes unhealthy after a motor start and remains unhealthy for longer than the Running Override Delay, a Process Interlock Trip or Process Interlock Stop will occur. If the RUNNING OVERRIDE DELAY is set to OFF, and the Pro- cess Interlock switch goes unhealthy after the motor has started, no Process Interlock Trip or Process Int e rlock Stop will occur. The OPERATION setpoint determines whether the Process Interlock feature is a Process Interlock Trip (reset required in order to restart the motor) or a Process Interlock Stop (no reset required ). The INSTANTANEOUS ALARM setpoint i s used t o create an al arm whenever the Process Interlock switch is unhealthy. There is no time delay associated with this alarm feature. Note that the names of the Process Interlock features can be changed to any 20 alphanumeric character sequence. See S3: PROCESS \ INTERLOCK NAMES for further detail.

setpoint sets the amount of time that the Process Interlock

Delay

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4.4 S3 PROCESS 4 SETPOINTS

• PLANT INTERLOCK: This function is used to provide a switch input trip feature similar to the Local Isolator. When this switch is unhealthy a Plant Interlock Trip will occur. The Plant Interlock Trip is automatically cleared when the Plant Interlock switch goes healthy.

• LOCKOUT RESET: This function is used to provide a separate reset facility for lockout trips (i.e. Overload, Ground Fault and Stalled Rotor). These trips are considered to be more serious than other MM2 trips. When used, this switch will reset Overload Trips (regardless of Lockout Time), Ground Fault Trips and Stalled Rotor Trips only. All other trips must be reset using the RESET key. Note that the RESET LOCKOUT USING RESET setpoint in S2: PROTECTION \ MOTOR PROTECTION OPTIONS allows lockout trips to be reset using the RESET key if required.

• SETPOINT ACCESS: This function is used to provide security against unauthorized changing of MM2 setpoints. When this switch is unhealthy setpoints cannot be changed from the MM2 keypad. When this switch is healthy setpoints can be changed from the keypad. If this feature is not used Setpoints can always be changed from the keypad.

• AUTO PERMISSIVE: This function is used together with the AUTO START A / AUTO START B functions and can be further defined using the AUTO PERMISSIVE INDICATION and AUTO MODE set-

points. If the Auto Permissive Switch is healthy, start commands can come from the Auto Start A / Auto Start B switches. When the Auto Permissive Switch is unhealthy the Auto Start A / Auto Start B switches are ignored. When the Auto Permissive Switch is healthy, start commands via the Start A and B switch inputs and the faceplate are blocked. See AUTO PERMISSIVE INDICATION and AUTO MODE setpoint descrip tions for further functionality.

• AUTO START A: This function is used in conjunction with the AUTO PERMISSIVE function described above. When the Auto Permissive switch is healthy, the Auto Start A switch can be used to start the motor.

• AUTO START B: This function is used together with the AUTO PERMISSIVE functi on. When the Auto Permissive switch is healthy, the Auto Start B switch can be used to start the motor in applications where Start B is used (Two Speed and Reversing starter types).

• AUTO PERMISSIVE INDICATION: This setpoint determines whether the AUTO or MANUAL indicator LED is illuminated when in the auto permissive mode. This allows the AUTO LED to be used for auto permissive and serial control, or just for serial control.

• AUTO MODE: This setpoint can be configured to either ‘SERIAL’ or ‘HARD-WIRED’. When in the ‘SERIAL ’ mode and the ‘AUT O’ button is pressed, the MM2 will execute start commands from the RS485 serial link only. When in the ‘HARD-WIRED’ mode and the ‘AUTO’ key is pressed, the MM2 will execute start commands from the ‘AUTO START A’ and ‘AUTO START B’ switch inputs only . Note: The ‘AUTO PERMISSIVE’ swi tch input must be healthy i n order to do auto star ts. This setpoint allows the user to change the control mode from MANUAL to HARD-WIRED AUTO via the AUTO/MANUAL buttons instead of having it done automatically when the Auto Permissive switch input is put into the healthy position.

• RESET EMERGENCY STOP TRIP: This function i s used when a separate Emergency Stop Trip Reset switch is required. Wh en this switch is healthy and an Emergency Stop Trip is present, the trip will be reset.

• RESET UNDERCURRENT TRIP: This function is used when a separate Undercurrent Trip Reset switch is required. When this switch is healt hy and an Undercur rent Trip is present, the trip will be reset.

• TWO WIRE CONTROL: This function is used to provide a means to switch from normal pulsed three wire start / stop control to maintained two wire start / stop control. When this switch is

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4 SETPOINTS 4.4 S3 PROCESS

healthy, start commands (Start A / Start B switch inputs Auto Start A / Auto Start B switch inputs) must be maintained in the closed state in or der f or the MM2 to keep t he motor running. When the Start input is opened, the MM2 sees this as a STOP command and both contactor outputs will open. This is useful in applications with limit switches, PLC control or Hand/Off/Auto control.

• TEST SWITCH: This function is used to create a Test switch facility. When the Test switch input

is healthy statistical counters (see actual values A4: STATISTICS \ COUNTERS) are not incremented with the exception of the interlock counter. This is used when control tests on the contactor are being performed and counters should not be updated. Note: if the motor is running when this switch is put into the healthy position, both contactors will open.

• REMOTE PERMISSIVE: This function provides a means to interl ock between the keyp ad START

A / START B keys and the Start A / Start B switch inputs. When a Remote Permissive switch is not used both of these start command sources will operate when the MM2 is in Manual mode (MANUAL LED on). When the Remote Permissive switch is healthy, the Start A / Start B switch inputs are functional but the START A / START B keypad keys are disabled. When the Remote Permissive switch is unhealthy, the START A / START B keypad keys are functi onal but the Start A / Start B switch inputs are disabled. Note: Auto mode or Hardwired Auto mode (AUT O LED on) disables both the Start A / Start B switches and the START A / START B keypad keys.

• COMMUNICATION SELECT: This function provides a facility to override the keypad AUTO /

MANUAL keys. When this switch is he althy the MM2 is forced into Auto Serial mode (AUTO LED on). When this switch is unhealthy, the MM2 reverts back to the mode that was present before the switch was closed (Manual mode-MANUAL LED on or Hard-Wired Auto mode-AUTO LED on).

• INTERLOCK COUNTER: This function provides a means to count switch closures when

assigned to one of the programmable switch inputs. When the switch input is put into the healthy position, the counter will increment by one. The counter can be viewed on page A4: STATISTICS \

COUNTERS. The interlock counter name and units can be programmed on page S3: PROCESS \ INTERLOCK NAMES. The digital input coming into the MM2 must have an ON time of no less than

100 ms and an OFF time of no less than 100 ms. This means that the MM2 can count up to 5 pulses per second = 5 Hz. The counter wil l count up to 655 35 and the n roll over. The counter can be cleared on page S1: CONFIGURATION \ STATISTICS or via the serial communications l ink.

• AUX RELAY 1 INHIBIT: This function will override/inhibit AUX Relay 1. When healthy, it will pre-

vent AUX Relay 1 from turning ON, or turn OFF AUX Relay 1 after it is already ON.

• WYE-DELTA 1M CONTA CT: This function is used as a status feedback input for the wye-delta

closed transition starter type. See Section 9.11: WYE-DELTA CLOSED TRANSITION STAR TER.

• WYE-DELTA 2S CONTAC T: This function is used as a status feedback input for the wye-delta

closed transition start type. See Section 9.11: WYE-DELTA CLOSED TRANSITION STARTER.

• U/V RESTART INHIBIT: This function disables the undervoltage restart feature when the switch

is in the healthy position and allows U/V restarts to tak e place when the switch is unheal thy. Note that the undervoltage r est art f eature must b e acti vated in S4: CONTROL for this interlock function to have any effect.

• AUTO TRANS 2S CONT ACT: This function Is used as a status feedback input for the autotrans-

former open/closed transition starter type. See Section 9.7: AUTOTRANSFORMER OPEN TRANSITION STARTER on page 9–20 and 9.8: AUTOTRANSFORMER CLOSED TRANSITION STARTER on page 9–24.

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4.4 S3 PROCESS 4 SETPOINTS

• STOP A: This function is used for end of travel applications. When an interlock configured for STOP A opens the corresponding output relay will open. When the STOP A input is open the motor cannot be started using start A commands or switch inp u ts.

• STOP B: This function is used for end of travel applications. When an interlock configured for STOP B opens the corresponding output relay will open. When the STOP B input is open the motor cannot be started using start B commands or switch inp u ts.

• REMOTE RESET: This function replaces the faceplate reset key. When configured the faceplate reset key will not reset any trips. When other switch inputs are used to reset specific trips the remote reset switch input will not reset those trips, i.e. Undercurrent Trip, Emergency Stop Trip, Lockout Trips.

• MOTOR SELECTOR A/B: This setting is used in conjunction with the Duty/Standby starter type. In the Manual mode the state of this interlock determines which of the two motors is used for starting (Healthy = Motor B). When A is selected only the contactor A output relay will respond to start commands. When B is selected only the contactor B output relay will respond to start commands.

• DUTY SELECT MAN/AUTO: This setting is used in conjunction with the Duty/Standby starter

type. This input determines the mode of operation for the Duty/Standby starter type either Manual or Auto. In the Auto mode the MM2 will alternatively start Motor A and Motor B. When the number of starts is an even number Motor A will be started the next time a start command is issued. When the number of starts is odd Moto r B will be started the next time a star t command is issued. In the event of a t rip on e ither motor, the motor that tripped wil l be pr evented f rom s tarti ng until reset is pressed. All starts will default to the untripped motor. When the trip occurs the MM2 automatically resets the trip to allow the other motor to be st arted. The trip message becomes an alarm message which must be reset to allow the tripped motor to start. If the second motor trips the MM2 will remain tripped until reset is pressed. The details of the Manual mode are described above under MOTOR SELECTOR A/B above.

NOTE

Faceplate Stop trips, Process Stop trips and ESD Stop trips MUST be manually reset regardless of the Duty/Standby mode. Local Isolator and Plant Interlock trips reset only when the input is healthy.

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4 SETPOINTS 4.4 S3 PROCESS

4.4.3 INTERLOCK NAMES

P ATH: SETPOINTS

S3 PROCESS tt INTERLOCK NAMES

ttt

PROCESS INTLK A NAME: PROCESS INTERLOCK A

PROCESS INTLK B NAME: PROCESS INTERLOCK B

↓ ↓

PROCESS INTLK J NAME: PROCESS INTERLOCK J

INTLK COUNTER NAME: INTERLOCK COUNTER

INTLK COUNTER UNITS: UNITS

Range: 20 alphanumeric characters

The MM2 allows programming of user defined names for the process interlock functions. To store a name, use the VALUE UP/DOWN keys to change the cursor to the desired letter or number. Press the STORE key. This stores the character and moves the cursor to the next position. Repeat until the entire message has been entered. A space can be used to replace characters if no new character is required. If the cursor is at the end of the message, pressing STORE wraps around to the first position. This message will now appear on any actual values message relating to process interlock A.

Range: 20 alphanumeric characters

See PROCESS INTERLOCK A NAME.

Range: 20 alphanumeric characters

PROCESS INTERLOCK A NAME

See

Range: 20 alphanumeric characters

This setpoint allows defining the name of the interlock counter. See PROCESS INTERLOCK A NAME for directions on entering characters.

Range: 20 alphanumeric characters

This setpoint allows defining the units of the interlock counter. See PROCESS INTLK A NAME for directions on entering characters.

P ATH: SETPOINTS

FIELD STOP:

UNLATCHED

PLATE STOP:

FACE

UNLATCHED

PROCESS STOP:

UNLATCHED

ttt

4.4.4 STOP CONFIGURATION

S3 PROCESS

STOP CONFIGURATION

ttt

Range: LATCHED, UNLATCHED

If the MM2 detects that either Contactor A or Contactor B has dropped out without receiving a Stop command, an External Stop sequence has occurred. If the FIELD STOP setpoint is set to UNLATCHED the message

EXTERNAL STOP

will be displayed. If the FIELD STOP setpoint is set to LATCHED the MM2 will initiate an Emergency Stop Trip. This trip condition must be reset before the motor can be restarted.

Range: LATCHED, UNLATCHED

When set to LATCHED, pressing the STOP button causes a latched trip. Pressing RESET allows the motor to restart. If the MM2 is receiving a constant start signal, the motor will start as soon as reset is pressed.

Range: LATCHED, UNLATCHED

When set to latched, a momentary opening of a contact connected to Terminal 51 will cause a latched trip condition. Pressing the reset key will allow the motor to restart. If the MM2 is receiving a constant start signal the motor will start as soon as reset is pressed.

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4.4 S3 PROCESS 4 SETPOINTS

4.4.5 ANALOG INPUT

PATH: SETPOINTS

ANALOG INPUT NAME: ANALOG INPUT

ANALO UNITS

MINIMUM SCALE: 4 mA: 0

MAXIMUM SCALE: 20 mA: 1000

ANALOG ALARM LOW LEVEL: OFF

ANALOG ALARM LOW DELAY: 5 s

ANALOG ALARM HIGH LEVEL: OFF

ANALOG ALARM HIGH DELAY: 5 s

ANALOG TRIP LOW LEVEL: OFF

S3 PROCESS

ttt

G INPUT UNIT:

tttt

ANALOG INPUT

Range: 20 alphanumeric characters

The MM2 allows the user to p rogram user defin ed names for the anal og input and units. To store the name, use VALUE UP/DOWN keys to change cursor to the desired letter or number. Press STORE. This stores the character and moves the cursor to the next position. Repeat this sequence until the entire message has been entered. One of the characters is a blank space which can be used if no new character is required. If the cursor is at the end of the message, pressing STORE causes the cursor to wrap around to the fi rs t posit ion . This message wi ll now appear on any actual values message relating to analog input.

Range: 20 alphanumeric characters

See ANALOG INPUT NAME for details on storing user defined units.

Range: 0 to 20000; Step: 10

The analog input can be scaled to user defined values. Minimum (4 mA) and maximum (20 mA) scale values must be specified. Enter the minimum scale value with this setpoint.

Range: 10 to 20000; Step: 10

Enter the maximum scale value correspon ding to a 20 mA analog i nput.

Range: 1 to 20000 or OFF; Step: 1

If the analog input scaled value drops below the level set by this setpoint, an Analog Input Low Alarm will occur. Note that the alarm level must be a value between the MINIMUM SCALE and MAXIMUM SCALE values.

Range: 1 to 600 seconds or OFF; Step: 1 second

The analog input scaled value must be below the ANALOG ALARM LOW LEVEL for the time specified by this setpoint before an alarm will occur.

Range: 1 to 20000 or OFF; Step: 1

If the analog input scaled value exceeds the level set by this setpoint, an Analog Input High Alarm will occur . Note tha t the alarm level must be a value between the MINIMUM SCALE and MAXIMUM SCALE values.

Range: 1 to 600 seconds or OFF; Step: 1 second

The analog input scaled value must be above the ANALOG ALARM HIGH LEVEL for the time specified by this setpoint before an alarm will occur.

Range: 1 to 20000 or OFF; Step: 1

If the analog input scaled value drops below the level set by this setpoint, an Analog Input Low Trip will occur. Note that the trip level must be a value between the MINIMUM SCALE and MAXIMUM SCALE values.

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4 SETPOINTS 4.4 S3 PROCESS

ANALOG TRIP LOW OVERRIDE: 5 s

ANALOG TRIP LOW DELAY: 5 s

ANALOG TRIP HIGH LEVEL: OFF

ANALOG TRIP HIGH OVERRIDE: 5 s

ANALOG TRIP HIGH DELAY: 5 s

Range: 1 to 125 seconds or OFF; Step: 1

The analog level must reach a healthy state (greater than trip level) after a start within the amount of time set by this setpoint. If the value is 0, the analog level must be healt hy when a sta rt is init iated or an anal og trip will occ ur immediatel y. If se t to OFF, the trip will occur if the analog level is unhealthy, regardless if the motor is running or stopped.

Range: 1 to 600 seconds or OFF; Step: 1 second

The analog input scaled value must be below the ANALOG TRIP LOW LEVEL for the time specified by this setpoint before a trip will occur.

Range: 1 to 20000 or OFF; Step: 1

If the analog input scaled value exceeds the level set by this setpoint, an Analog Input High Trip will occur. Note that the trip level must be a value between the MINIMUM SCALE and MAXIMUM SCALE values.

Range: 1 to 125 seconds or OFF; Step: 1

The analog level must reach a healthy state (less than trip level) after a start within the amount of time set by this setpoint. If the value is 0, the analog level must be healthy when a start is initiated or an analog trip will occur immediately. If the value is set to OFF, the trip will occur if the analog level is unhealthy, regardless if the motor is running or stopped.

Range: 1 to 600 seconds or OFF; Step: 1 second

The analog input scaled value must be above the ANALOG TRIP HIGH LEVEL for the time specified by this setpoint before a trip will occur.

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Page 62

4.5 S4 CONTROL 4 SETPOINTS

4.5 S4 CONTROL 4.5.1 DESCRIPTION

This page is used to configure all control features in the MM2. Setpoints Page 4 is divided into three sections, UNDERVOLTAGE AUTO-RESTART, AUX RELAY 1 CONFIG and AUX RELAY 2 CONFIG.

4.5.2 UNDERVOLTAGE AUTORESTART

PATH: SETPOINTS

UNDERVOLTAGE RESTART: ENABLE

IMMED. RESTART POWER LOSS TIME: 200 ms

DELAY RESTART POWER LOSS TIME: 2.0 s

RESTART TIME DELAY

2.0 s

tttt

S4: CONTROL t UNDERVOLTAGE AUTO RESTART

Range: ENABLE, DISABLE

It is possible to restart the motor after a momentary power loss if this feature is enabled. When the control vo ltage ( derived fr om the incomi ng motor supply) drops below the dropout voltage, both contactors are deenergized. Voltage thresholds for the two internally set control voltage levels are 80 V for 120 V setting and 150 V for 240 V setting. At nominal voltage, the MM2 rides through a power outage less than 135 ms (varies according to the number of output relays energized at the time of power failure). Critical data i s saved to E outage that exceeds the MM2 ride-through initializes a backup timer that continues to run without power for approximat ely 1 hour. Once control power is restored, the MM2 can take up to 300 ms to initialize; this time includes the initializing of the microprocessor, variables in the code, the determination that a restart is required, and the closure of the internal output relay. The reaction time of the contactor will be in addition to the 300 ms power-up time. If control voltage is restored within the IMMED. RESTART POWER LOSS TIME (0.1 to 0.5 sec.), the motor will be restarted immediately. If the supply is restored after the IMMED. RESTART POWER LOSS TIME but before the DELAY RESTART POWER LOSS TIME, the motor will be restarted af te r the RESTART TIME DELAY. If a del ayed rest ar t is always required, set the DELAY RESTART POWER LOSS TIME to UNLIM- ITED. Select DISABLE if this feature is not required.

PROM at this time. A power

Range: 100 to 500 ms or OFF; Step: 20 ms

This is the time measured by the MM2 backup processor; it is not the time the AC power has been off. See UNDERVOLTAGE RESTART for details.

Range: 0.1 to 10 seconds or TIME UNLIMITED; Step: 0.1 sec.

This is the time measured by the MM2 backup processor; it is not the time the AC power has been off. See UNDERVOLTAGE RESTART for details.

Range: 0.2 to 1200.0 seconds; Step: 0.2 seconds

See UNDERVOLTAGE RESTART for details.

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4 SETPOINTS 4.5 S4 CONTROL

4.5.3 AUX RELAY 1/2 CONFIG

P ATH: SETPOINTS

The MM2 has two auxiliary programmable output relays. These two outputs can be assigned any of the functions listed below. Once a function has been assigned to one of the auxiliary relays it cannot be assigned to the other with the exception of the SERIAL CONTROL function which can be set to both auxiliary relays.

The setpoints listed under the AUX RELAY 2 CONFIG page operate in the same manner as the setpoints shown for AUX RELAY 1 CONFIG.

NOTE

AUX RELAY 1 FUNCTION

SERIAL CONTROL

tttt

S4 CONTROL tt AUX 1/2 RELAY CONFIG

Range: SERIAL CONTROL, TRIPS, ALARMS, PRE CONTACTOR A, POST CONTACTOR A, POST CONTACTOR B, MOTOR AVAILABLEMAN, LOAD INCREASE ALARM, UNDERCURRENT TRIP, UNDERPOWER TRIP, KEYPAD RESET, INTERLOCK 1 to INTERLOCK 10, AUTO MODE, MOTOR RUNNING, GROUND F AULT TRIP, WYEDELTA CLS TRANS, AUTOTRANSFORMER 2S, NOT USED, PRE CONTACTOR B, SEGREGATED G/F ALARM, THERMAL CAPACITY ALARM, MOTOR AVAILABLE AUTO, MOTOR AVAILABLE, OVERLOAD, SOFT STARTER BYPASS

The dual form “C” AUX Relay 1 can be confi gured t o a ctivat e o n vari ous conditions as described below.

AUX RELAY 1 DELAY

5 s

AUX RELAY 1 PRE START DELAY: 5 s

AUX RELAY 1 POST START DELAY: OFF s

ENERGIZE ON MOTOR START DELAY: 5 s

DE-ENERGIZE ON MOTOR STOP DELAY: 5 s

Range: 0 to 125 sec.; Step: 1

Provides a delayed energization of AUX Relay 1 when POST CONTACTOR A or POST CONTACTOR B is selected as the AUX RELAY 1 FUNCTION.

Range: 0 to 900 sec.; Step: 1

Determines how long the AUX Relay 1 will energize before energizing Contactor A. When set to 0, both AUX Relay 1 and Contactor A will energize at the same time.

Range: 0 to 125 sec. or OFF; Step: 1

Determines how long AUX 1 remains energized after Contactor A closes. When set to 0, AUX 1 de-energizes as soon as Contactor A closes. When set to OFF, AUX 1 remains energized until Contactor A opens.

Range: 0 to 125 sec.; Step: 1

Provides a delayed energization of the AUX Relay 1 when MOTOR RUN- NING is selected as the AUX RELAY 1 FUNCTION. The AUX Relay 1 ener- gizes after this time delay on the occurrence of a motor st art.

Range: 0 to 125 sec.; Step: 1

Provides a delayed de-energization of the AUX Relay 1 when MOTOR RUNNING is selected as the AUX RELAY 1 FUNCTION. The AUX Relay 1 will de-energize after this time delay on the occurrence of a motor stop.

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4.5 S4 CONTROL 4 SETPOINTS

AUX 1 OPERATION: NON-FAILSAFE

DELAY CONTACTOR G/F TRIP BY: 0 ms

• SERIAL CONTROL: The AUX Relay 1 can be energized or de-energized via the serial port.

• TRIPS: The AUX Relay 1 will be energized when the MM2 is tripped. Resetting the MM2 will deenergize the AUX Relay 1.

• ALARMS: The AUX Relay 1 will be energized while any alarm is present.

• PRE CONTACTOR A: The AUX Relay 1 will energize when the MM2 receives a start command. The Contactor A relay will start the motor after the delay specified in the AUX RELAY 1 PRE START DELAY setpoint. The AUX Relay 1 will de-energize after the AUX RELAY 1 POST START DELAY times

out or when Contactor A de-energizes.

• PRE CONTACTOR B: The AUX Relay will energize when the MM2 receives a start B command. The Contactor B relay will start the motor after the delay specified in the AUX RELAY 1 PRE START DELAY setpoint. The Aux Relay will de-ener gi ze aft er the AUX RELAY 1 POST START DELAY times out or when Contactor B de-energizes. Pre Cont actor B is active for the TWO SPEED, FV REVERSING and DUTY/STANDBY starter types only.

Range: FAILSAFE, NON-FAILSAFE

Choose between NON-FAILSAFE or FAILSAFE operation of AUX Relay 1. In NON-FAILSAFE mode, the relay will be de-energized in its inactive state and energized in its active state. In FAILSAFE mode, the relay will be energized in its inactive state and de-energized in its active state.

Range: 0 to 1000 ms; Step: 100 ms

• POST CONTACTOR A: The AUX Relay 1 will energize after the Contactor A relay in the time specified by the AUX RELAY 1 DELAY setpoint. The AUX Rel ay 1 will de-ener gize when Contact or A de-energizes.

• POST CONTACTOR B: The AUX Relay 1 will energize after the Contactor B relay in the time specified by the AUX RELAY 1 DELAY setpoint. The AUX Rel ay 1 will de-ener gize when Contact or B de-energizes.

• MOTOR AVAILABLE MANUAL: When the Motor Status message indicates that the motor can be started manually the AUX Relay 1 will be energized. Any other Motor Status indication will cause the AUX Relay 1 to be de-energized.

• LOAD INCREASE: The AUX Relay 1 will energize while a Load Increase Alarm is present.

• UNDERCURRENT TRIP: The AUX Relay 1 will energize while an Undercurrent Trip is present.

• UNDERPOWER TRIP: The AUX Relay 1 will energize while an Underpower T rip is present.

• KEYPAD RESET: The AUX Relay 1 will ener gize while the RESET key is pressed.

• INTERLOCK 1: The AUX Relay 1 will energize while the Interlock 1 switch input is closed.

• INTERLOCK 2: The AUX Relay 1 will energize while the Interlock 2 switch input is closed.

• INTERLOCK 3: The AUX Relay 1 will energize while the Interlock 3 switch input is closed.

• INTERLOCK 4: The AUX Relay 1 will energize while the Interlock 4 switch input is closed.

• INTERLOCK 5: The AUX Relay 1 will energize while the Interlock 5 switch input is closed.

• INTERLOCK 6: The AUX Relay 1 will energize while the Interlock 6 switch input is closed.

4-30 MM2 Motor Manager 2

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4 SETPOINTS 4.5 S4 CONTROL

• INTERLOCK 7:The AUX Relay 1 will energize while the Interlock 7 switch input is closed.

• INTERLOCK 8: The AUX Relay 1 will energize while the Interlock 8 switch input is closed.

• INTERLOCK 9: The AUX Relay 1 will energize while the Interlock 9 switch input is closed.

• INTERLOCK 10: The AUX Relay 1 will energize while the Interlock 10 switch input is closed.

• AUTO MODE: The AUX Relay 1 will energize when the AUTO LED is on.

• MOTOR RUNNING: The AUX Relay 1 will energize while the motor is runni ng in conj uncti on with

the Motor Start Delay and Motor Stop Delay.

• GROUND FAULT TRIP: The AUX Relay 1 will energize when a ground fault trip occurs.

The MM2 energizes the auxiliary relay and de-energizes contactor A at the same time the ground fault trip occurs. See the warning notes under Motor Protection/

WARNING

• WYE DELTA CLS TRANS: This function must be configured when using the wye delta closed

transition starter type. See Section 9.11: WYE-DELTA CLOSED TRANSITION STARTER on page 9–32 for more details.

• AUTOTRANSFORMER 2S: This function must be configured when using the autotransformer

open/closed transition starter type. See Section 9.7: AUTOTRANSFORMER OPEN TRANSITION STARTER on page 9–20 and 9.8: AUTOTRANSFORMER CLOSED TRANSITION STARTER on page 9–24 for more details.

Ground Fault for more details. Use the Delay Contactor Ground Fault Trip By setting for coordination.

• NOT USED: This function may be stored if the AUX Relay is not used. Factory default is serial

control.

• SEGREGATED G/F ALARM: This function will energize the AUX Relay when a ground fault

alarm occurs. If the other AUX Relay is configured for ALARMS it will not operate until another alarm occurs that is not a ground fault alarm.

• THERMAL CAPACITY ALARM: The AUX Relay 1 will energize when a thermal capacity alarm

is present.

• MOTOR AVAILABLE AUTO: This AUX Relay function will activate the AUX Relay when the

motor is available to start in Auto Mode.

• MOTOR AVAILABLE: This AUX Relay function will activate the AUX Relay when the motor is

available to start regardless of which mode the MM2 is presently in (Auto or Manual). The AUX Relay will remain active when the motor is running to indicate normal operation (that is, no stop inputs or trips).

• OVERLOAD: This AUX Relay function will activate the Aux Relay when the motor is tripped on

overload.

• SOFT STARTER BYPASS: This AUX Relay function can be configured when using soft starter

type. See Section 9.13: SOFT STARTER on page 9–38 for more details.

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MM2 Motor Manager 2 4-31

Page 66

4.6 S5 MONITORING 4 SETPOINTS

4.6 S5 MONITORING 4.6.1 DESCRIPTION

This page is used to enter setpoints for monitoring and motor maintenance. Setpoints Page 5 has two sections, PLANT CONDITION and PRESET COUNTERS AND TIMERS.

4.6.2 PLANT CONDITION

PATH: SETPOINTS

MOTOR GREASING INTERVAL: OFF hrs

CONTACTOR INSPECTION

OFF x 1000 OPS

MAX MOTOR STOPPED TIME: OFF hrs

ttttt

S5 MONITORING t PLANT CONDITION

Range: 100 to 50000 hours or OFF; Step: 100 HOURS

Enter the interval at which the motor bearings must be lubricated. When the Motor Running Time exceeds this setpoint a MOTOR GREASING INTERVAL ALARM is generated. Use the CLEAR TIMERS setpoint in S1: CONFIGURATION \ STATISTICS to clear the Motor Running Hours. If this feature is not required set this setpoint to OFF.

Range: 1000 to 10000000 operations or OFF; Step: 1000 ops.

Enter the interval at which the contactor contacts must be inspected for wear. When the NUMBER OF STARTS counter exceeds thi s setpoi nt a CONTACTOR INSPECTION INTERVAL ALARM is generated. Use the S1: CONFIGURATION \ STATISTICS \ CLEAR COUNTERS setpoint to clear the NUMBER OF STARTS counter. If this feature is not required set this setpoint to OFF.

Range: 10 to 10000 hours or OFF; Step: 10 hours

Enter the maximum interval that the motor can be left not running. When the Motor Stopped Time exceeds this setpoint, a MAXIMUM MOTOR STOPPED TIME ALARM is generated. Start the motor to clear the Motor Stopped Time. If this feature is not required set this setpoint to OFF.

4-32 MM2 Motor Manager 2

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4 SETPOINTS 4.6 S5 MONITORING

4.6.3 PRESET COUNTERS AND TIMERS

P ATH: SETPOINTS

ttttt

PRESET RUNNING HOURS: 0 HRS

PRESET STOPPED HOURS: 0 HRS

PRESET NUMBER OF STARTS: X100

PRESET OVERLOAD TRIPS: 0

PRESET THERMISTOR TRIPS: 0

PRESET GROUND FAULT TRIPS: 0

PRESET SINGLE PHASE TRIPS: 0

PRESET ACCELERATION TRIPS: 0

S5 MONITORING

PRESET COUNTERS AND TIMERS

Range: 0 to 65535; Step 1

Sets the number of Running Hours to a predetermined value.

Range: 0 to 65535; Step 1

Sets the number of Stopped Hours to a predetermined value.

Range: 0 to 65535; Step 1

Sets the Number Of Starts to a predetermined value within 100 starts.

Range: 0 to 65535; Step 1

Sets the number of Overload Tri ps to a predetermined value. Range: 0 to 65535; Step 1

Sets the number of Thermistor T ri ps to a predetermined value. Range: 0 to 65535; Step 1

Sets the number of Ground Fault trips to a predetermined value. Range: 0 to 65535; Step 1

Sets the number of Single Phase trips to a predetermined value. Range: 0 to 65535; Step 1

Sets the number of Acceleration trips to a predetermined value.

PRESET UNDERCURRENT TRIPS: 0

PRESET UNDERPOWER TRIPS: 0

PRESET STALLED ROTOR TRIPS: 0

PRESET CONTROL TRIPS: 0

PRESET INTERLOCK COUNTER: 0

Range: 0 to 65535; Step 1 Sets the number of Undercurrent trips to a predetermined value.

Range: 0 to 65535; Step 1 Sets the number of Underpower trips to a predetermined value.

Range: 0 to 65535; Step 1 Sets the number of Stalled Rotor trips to a predetermined value.

Range: 0 to 65535; Step 1 Sets the number of Control trips to a predetermined value.

Range: 0 to 65535; Step 1 Sets the number of Interlock Counter operations to a predetermined

value.

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MM2 Motor Manager 2 4-33

Page 68

4.7 S6 FACTORY DATA 4 SETPOINTS

4.7 S6 FACTORY DATA 4.7.1 DESCRIPTION

This page contains information about the version of the MM2 and data for GE Power Management service technicians. Set points Page 6 is divided into two sections, PRODUCT ID ENTIFICATION and FACTORY SERVICE DATA.

4.7.2 PRODUCT FIRMWARE

PATH: SETPOINTS

MOD NUMBER(S): 000

MOTOR MANAGER 3 VERSION: X.XX

BOOT PROGRAM

VERSION: X.XX

DISPLAY PROGRAM VERSION: X.XX

SUPERVISOR PROGRAM VERSION: X.XX

MM2 HARDWARE REVISION: X.XX

tttttt

S6 FACTORY DATA t PRODUCT FIRMWARE IDENTIFICATION

Range: for identification only

If the MM2 has been modifi ed so that i t is no longer a s tandard model , a modification number will be displayed in this message.

Range: for identification only

This message identifies the MM2 main firmware version.

Range: for identification only

This message identifies the MM2 Boot Program version.

Range: for identification only

This message identifies the MM2 Display Program version (when the display option has been ordered).

Range: for identification only

This message identifies the MM2 Supervisor Program version.

Range: for identification only

This message identifies the Hardware revision the currently loaded firmware was compiled for.

4.7.3 PRODUCT MODEL IDENTIFICATION

PATH: SETPOINTS

tttttt

SERIAL NUMBER: D7191234

DATE OF MANUFACTURE: February 1, 1996

PATH: SETPOINTS

tttttt

FACTORY SERVICE PASSCODE: 0

S6 FACTORY DATA tt PRODUCT MODEL IDENTIFICATION

Range: for identification only

This message identifies the MM2 serial number.

Range: for identification only

This message identifies the date of manufacture.

S6 FACTORY DATA

FACTORY SERVICE DATA

ttt

Range: 0 to 9999

his message identifies the MM2 order code.

4-34 MM2 Motor Manager 2

4.7.4 FACTORY SERVICE DATA

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Page 69

5 ACTUAL VALUES 5.1 OVERVIEW

5 ACTUAL VALUES

All Actual Values messages displayed by the MM2 are listed and explained in this chapter. Messages are organized into l ogical groups of pages. Each page contains sections of related messages. Actual Values has 4 pages which contain the following information:

• Page 1: Data

• Page 2: Status

• Page 3: Inputs

• Page 4: Statistics The following pages show the actual message which can be read from the display on the front panel

of the MM2. Quantities shown, are typical values only. Different quantities will be displayed in each particular application.

When finished viewing a message in a particular section, press the MESSAGE RIGHT key to view the next line. When the last line of a section is reached, press the MESSAGE

NOTE

Up to 5 default messages can be selected to automatically scan sequentially when the motor is running and the MM2 is left unattended. If no keys are pressed for 2 minutes and the motor is running then the currently displayed message will automatically be overwritten by the first default message. After 3 seconds, the next default message in the sequence will display if more than one is selected. Alarm and trip messages will override default message display. Any Actual Value or Setpoint can be selected as a default message. For example, the MM2 could be programmed to display these messages in sequence: 3 phase current, ground current, motor status, motor current as a percentage of full load and analog input.

DOWN key to view the next section in the page. When the last line of the last section within a page is reached, press the ACTUAL key to select the next page.

5.1 OVERVIEW 5.1.1 DESCRIPTION

5.1.2 DEFAULT MESSAGE SELECTION

Messages are displayed in the order they are selected. To add a default message, use the MESSAGE keys to display any Actual Values or Setpoints message to be added to the default queue. Press the STORE key twice in rapid succession. The display will prompt:

TO ADD THIS DEFAULT MESSAGE PRESS STORE

Press the STORE key again and the dis pla y will confir m that the defaul t mes sage has been added. If 5 default messages are already selected, the first message is erased and the new message added to the end of the queue.

To delete a default message, first wait for 2 minutes and note which messages are displayed in sequence. Use the MESSAGE keys to display the default message to be erased. Press the STORE then RESET key in rapid succession. The display will prompt:

TO DELETE THIS MESSAGE PRESS STORE

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MM2 Motor Manager 2 5-1

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5.1 OVERVIEW 5 ACTUAL VALUES

Press the STORE key and the display will confirm that the default message has been deleted. If the message was not a current default message, the display will read:

NOT A SELECTED DEFAULT MESSAGE

5.1.3 ABBREVIATIONS

The following abbreviations are used in the Actual Values messages.

• A, AMPS: Amperes

• kW: Kilowatts

• kWhr: Kilowatt hours

• MIN: Minutes

• N/O: Normally Open

• O/L: Overload

• s: Seconds

]] ACTUAL VALUES ]] A1: DATA

] MOTOR DATA ]

] PROCESS DATA ]

] PROGRAMMABLE ] MESSAGE

]] ACTUAL VALUES ]] A2: STATUS

] TRIP DATA ]

] ALARM DATA ]

] MOTOR STATUS ]

]] ACTUAL VALUES ]] A3: INPUTS

] INPUT CONTACTS ] STATUS

Figure 5–1: MESSAGE SUMMARY

]] ACTUAL VALUES ]] A4: STATISTICS

] TIMERS ]

] COUNTERS ]

5-2 MM2 Motor Manager 2

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Page 71

5 ACTUAL VALUES 5.2 A1 DATA

5.2 A1 DATA 5.2.1 DESCRIPTION

This page contains the real-time data as measured by the MM2. Actual Values Page 1 is divided into three sections, MOTOR DATA, PROCESS DATA, and PROGRAMMABLE MESSAGE.

5.2.2 MOTOR DATA

PATH: ACTUAL VALUES t A1: DATA t MOTOR DATA

MOTOR STATUS:

A= 74 B= 74 C= 74 AMPS

This message indicates the name and status of the motor. The top line of the display (20 characters) can be programmed to a user defined alphanumeric name. The second line indicates motor status. The following list shows the possible motor status indications:

•

Unavailable

ing start commands from operating. Poss ible condi tions are: a tr ip i s present, the STOP key is being pressed, the Stop Switch input is open, one of the Process Interlock switches is open, an undervoltage delayed restart is in progress, an Autotransformer Start Inhibit is in progress, or the STARTER TYPE setpoint is OFF.

•

Available-Auto

Start A / Auto Start B interlock switch inputs will be performed. Start commands from the Start A / Start B switch inputs and the START A/ START B keys will be ignored.

•

Available-Manual

inputs and/or the START A/ START B keys will be performed. Start commands from the serial port and Auto Start A / Auto Start B switch inputs will be ignored.

•

Running

This message displays the actual RMS current in each phase in amps. Format: 10.0 at CT Primary

: There is at least one condition present that is prevent-

: Start commands from the serial port or the Auto

: Start commands from the Start A / Start B switch

: At least one contactor output relay is closed.

50 A; 100 at CT Primary > 50 A.

≤

GROUND CURRENT =

2.4 AMPS

MOTOR LOAD =

74% FULL LOAD

GROUND CURRENT =

2.4 AMPS

MOTOR LOAD =

74% FULL LOAD

GE Power Management

This message displays the ground fault leakage current flowing from any phase to ground in amps.

This message displays the motor load as a percentage of full load current (FLC). The motor load is calculated as the average of the three motor phase currents. When the value exceeds 100%, an overload condition exists. The MM2 eventually trips if the current is not reduced below 100% of FLC × SERVICE FACTOR.

This message displays the ground fault leakage current flowing from any phase to ground in amps.

MM2 Motor Manager 2 5-3

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5.2 A1 DATA 5 ACTUAL VALUES

THERMAL CAPACITY USED = 21 %

This message displays the thermal memory accumulated according to motor

history and chosen overload curve. A thermal capacity value

I2t

equal to 100% causes an Overload Tr ip.

PHASE CURRENT UNBALANCE = 1 %

Displays the percentage unbalance in the motor phase currents. The unbalance is calculated as shown in Section 1.2.1: MM2 SPECIFICATIONS on page 1–4.

ACCELERATION TIME =

0.0 s

This message displays the motor acceleration time from the last motor start. This value is determined by the amount of time required for the average phase current to go below 1.0

FULL LOAD CURRENT

after a

motor start.

LAST STARTING CURRENT = 340 AMPS

This message displays the maximum current measured during the last motor start. This value is saved until the next start or until power is cycled on the MM2.

O/L TIME TO TRIP =

---- s

This message displays the estimated time to trip based on the present overload level and thermal capacity used. This message is only used in conjunction with overload trips.

POWER = +1000 kW This message displays the three phase power, calculated using phase

A current and voltage

. This message will appear only if the

VT PRIMARY VOLTAGE setpoint is programmed.

ENERGY USED =

10600 kWhr

This message displays the total accumulated energy used since last cleared. This value is updated once every minute. This message will appear only if the VT PRIMARY VOLTAGE setpoint is programmed.

VT VOLTAGE =

480 V

This message displays the voltage present at the primary of the VT. This message will appear only if the VT PRIMARY VOLTAGE setpoint is pro- grammed.

PATH: ACTUAL VALUES t A1: DATA tt PROCESS DATA:

ANALOG INPUT= 142 UNITS

This message displays the 4 to 20 mA analog input value scaled to the minimum and maximum values as specified in setpoints. The analog input name and units are user definable in the setpoints area of the MM2 messages.

PATH: ACTUAL VALUES t A1: DATA

PROGRAMMABLE MESSAGE SAMPLE TEXT

This message displays the 4 to 20 mA analog input value scaled to the minimum and maximum values as specified in setpoints. The analog

PROGRAMMABLE MESSAGE:

ttt

input name and units are user definable in the setpoints area of the MM2 messages.

5.2.3 PROCESS DA TA

5.2.4 PROGRAMMABLE MESSAGE

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5 ACTUAL VALUES 5.3 A2 STATUS

5.3 A2 STATUS 5.3.1 DESCRIPTION

This page contains information on the status of the MM2 following an alarm and/or trip. Information such as cause of alarm/trip and the motor values prior to a trip are included. The page also contains a section describing the control status of the motor. Actual Values Page 2 is divided into three sections, TRIP DATA, ALARM DATA and MOTOR STATUS.

5.3.2 TRIP DATA

PATH: ACTUAL VALUES tt A2 STATUS t TRIP DATA

CAUSE OF TRIP: NO TRIP

CAUSE OF LAST TRIP: PARAMETER NOT SET

TIME TO RESET =

10 MINUTES

PRETRIP A = 238 B = 74 C = 74

This message displays the cause of the current trip. If no trip is present, the display indicates NO TRIP. When a trip occurs, the cause of trip message will override the currently selected default message. The possible causes of trip are:

OVERLOAD GROUND FAULT SINGLE PHASE THERMISTOR ACCELERATION TIME STALLED ROTOR PLANT INTERLOCK LOCAL ISOLATOR UNDERCURRENT UNDERPO WER SERIAL LINK FAIL INTERNAL FAULT ANALOG INPUT LOW ANALOG INPUT HIGH EMERGENCY STOP PROCESS INTERLOCK A-J PROCESS STOP FACEPLATE STOP OPEN CONTROL CIRCUIT UNDER VOLTAGE OVERVOLTAGE PARAMETERS NOT SET

This message displays the last trip to take place. It is used as a reference for the pretrip phase and ground currents.

This message is visible only when an Overload Tri p is present. The time left before the Overload Trip can be reset is displayed. Note that the Lockout Reset Interlock feature can be used to override thi s time.

This message displays the motor phase current that was flowing at the time of trip.

PRETRIP GROUND CURRENT = 2.4 AMPS

Pretrip values for current related trips are stored in the EEPROM at the time of trip. This enables the MM2 to “remember” pretrip values if power is removed. This feature is

NOTE

GE Power Management

enabled for overload, single-phase, undercurrent, underpower, acceleration time, stalled rotor, and ground fault trips. When a trip not listed above occurs and power is removed, the MM2 displays zero for pretrip values.

This message displays the ground leakage current that was flowing from any phase to ground at the time of trip.

MM2 Motor Manager 2 5-5

Page 74

5.3 A2 STATUS 5 ACTUAL VALUES

5.3.3 ALARM DA TA

PATH: ACTUAL VALUES tt A2 STATUS tt ALARM DATA

Any alarm conditions that are currently active will be displayed. This could be one or more of the following:

NO ACTIVE ALARMS This message is displayed only when there are no alarms currently

active. If at least one alarm has occurred, the most recent alarm message will override the currently selected default message and this message will not be displayed.

LOAD INCREASE

ALARM

Load Increase Alarm Level has been exceeded.

INTERNAL FAULT

ALARM

PHASE UNBALANCE

ALARM

THERMISTOR

ALARM

UNDERPOWER

ALARM

UNDERCURRENT

ALARM

ACCELERATION TIME

ALARM

GROUND FAULT

ALARM

OPEN CONTROL

CIRCUIT

WELDED CONTACTOR While performing a stop, the MM2 did not see a c hange in cont actor s ta-

INVERTER TRIPPED An inverter trip has been detected by the MM2. This occurs on an

DRIVE FAILED TO

START

DRIVE FAILED TO

STOP

INCOMPELTE

START

MOTOR GREASING

INTERVAL EXCEEDED

Self-test checking detected an internal hardware fault.

Phase current unbalance of greater than 15% has existed for more than 5 seconds.

The Thermistor Hot resistance has been exceeded.

The power has dropped below the Underpower Alarm Level for the Underpower Alarm time delay.

The average phase current has dropped below the Undercurrent Alarm Level for the Undercurrent Alarm T ime Delay.

The measured motor acceleration time has exceeded the Acceleration Time Alarm Level.

The ground current has exceeded Ground Fault Alarm Level for the Ground Fault Alarm Time Delay.

While performing a start, the MM2 d id not see a ch ange in conta ctor s tatus (open to closed) within 1 sec. of energizing the output relay.

tus (closed to open) within 1 sec. of de-energizi ng the output relay.

inverter starter when Contactor B opens and Contactor A stays closed with no stop command processed by the MM2.

An Inverter starter has failed to complete a start sequence. This occurs on an inverter starter when, during a start sequence, Contactor A cl oses as expected but Contactor B fails to close.

An Inverter starter has failed to complete its stop sequence. This occurs on an inverter starter when Contactor B fails to open during a stop sequence. An Autotransformer starter has failed to complete its start sequence. This occurs on an autotransformer starter start sequence when Contactor A closes as expected but Contactor B fails to close.

The Motor Greasing Interval time has been exceeded.

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5 ACTUAL VALUES 5.3 A2 STATUS

CONTACT INSPECTION

INTERVAL EXCEEDED

MAXIMUM MOTOR

STOP TIME EXCEEDED

ANALOG HIGH

ALARM

ANALOG LOW

ALARM

PROCESS INTERLOCK A

ALARM

PROCESS INTERLOCK B

ALARM

PROCESS INTERLOCK C

ALARM

PROCESS INTERLOCK D

ALARM

PROCESS INTERLOCK E

ALARM

PROCESS INTERLOCK F

ALARM

The number of contactor operations has exceeded the Contactor Inspection Interval Alarm count.

The time that the motor has remained stopped has exceeded the Maximum Motor Stopped Time alarm level. This can be cleared by starting the motor . The Analog Input value has exceeded the Analog Input High Alarm Level for the Analog Input High Alarm Time Delay.

The Analog Input value has dropped below the Analog Input Low Alarm Level for the Analog Input Low Alarm Time Delay.

An open Process Interlock A switch input has been detected.

An open Process Interlock B switch input has been detected.

An open Process Interlock C switch input has been detected.

An open Process Interlock D switch input has been detected.

An open Process Interlock E switch input has been detected.

An open Process Interlock F switch input has been detected.

PROCESS INTERLOCK G

ALARM

PROCESS INTERLOCK H

ALARM

PROCESS INTERLOCK I

ALARM

PROCESS INTERLOCK J

ALARM

MOTOR A TRIP ALARM =

OVERLOAD

THERMAL CAPACITY

ALARM

UNDERVOLTAGE

ALARM

OVERVOLTAGE

ALARM

START BLOCK

ALARM

An open Process Interlock G switch input has been detected.

An open Process Interlock H switch input has been detected.

An open Process Interlock I switch input has been detected.

An open Process Interlock J switch input has been detected.

A Duty/Standby starter type motor has tripped. The cause of the trip is displayed on the bottom line.

The thermal capacity used has exceeded the Alarm level.

The primary voltage measurement has dropped below the Alarm level.

The primary voltage measurement has exceeded the Alarm level.

A Start Block is in effect.

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5.3.4 MOTOR STATUS

PATH: ACTUAL VALUES tt A2: STATUS

MOTOR STATUS: RUNNING

DELAYED RESTART IN PROGRESS: 15 s

DELAYED START IN PROGRESS: 15 s

TRANSFER TIME IN PROGRESS: 10 s

RESTART INHIBIT

25 s

EXTERNAL START This message will appear if the contactor closed without receiving a

CAUSE OF STOP This message will appear to indicate the cause of the current stop con-

MOTOR STATUS

ttt

This message has the same possible values as the Motor Status message in page A1: DATA \ MOTOR DATA.

This message will appear if a delayed undervoltage restart is in progress. The displayed time indicates the time remaining until the start sequence will begin.

This message will appear if a delayed start is in progress. This occurs if one of the auxiliary relays is set to Pre Contac tor A OR B operation. The displayed time indicates the time remaining until contactor A energizes.

This message will appear if a high speed to low speed transition is occurring on a T wo Speed st arter o r if a directi on change is occur ring on Reversing starter. The displayed time indicates either the time remaining until the low speed output relay (Contactor A) will energize, or the time remaining until the forward output relay (Contactor A) or the reverse output relay (Contactor B) wil l energize.

This message will appear when an autotransformer start is inhibited. The restart inhibit time is determined from the autotransformer starts per hour setpoint.

start command from the MM2. The MM2 will close the corresponding output relay to seal in the contactor.

dition.

CAUSE OF LAST STOP This message indicates the cause of the last stop operation.

EXTERNAL STOP This message indicates that the stop operation was caused externally

to the MM2, i.e. The contactor coil de-energized

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5 ACTUAL VALUES 5.4 A3 INPUTS

5.4 A3 INPUTS 5.4.1 DESCRIPTION

This page contains information on the 16 switch inputs to the MM2. Actual Values Page 3 contains one section, INPUT CONTACTS STATUS.

5.4.2 INPUT CONTACTS STATUS

PATH: ACTUAL VALUES

START A INPUT: OPEN

START B INPUT: OPEN

STOP INPUT: OPEN

CONTACTOR A N/O: OPEN

CONTACTOR B N/O: OPEN

LOCAL ISOLATOR N/O: OPEN

INTERLOCK 1: OPEN NOT USED

ttt

A3 INPUTS t INPUT CONTACTS STATUS

Start A switch input status. CLOSED: Start A switch closed; OPEN: Start A switch open

Start B switch input status. CLOSED: Start B switch closed; OPEN: Start B switch open

Stop switch input status. CLOSED: Stop switch closed; OPEN: Stop switch open

Contactor A N/O switch input status. CLOSED: Contactor A N/O switch closed; OPEN: Contactor A N/O

switch open Contactor B N/O switch input status.

CLOSED: Contactor B N/O switch closed; OPEN: Contactor B N/O switch open

Local Isolator switch input status. CLOSED: Local Isolator switch closed; OPEN: Local Isolator switch

open Interlock 1 switch input status.

CLOSED: Interlock 1 switch closed; OPEN: Interlock 1 switch open

INTERLOCK 2: OPEN NOT USED

INTERLOCK 3: OPEN NOT USED

INTERLOCK 4: OPEN NOT USED

INTERLOCK 5: OPEN NOT USED

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This message also shows the function, if any, assigned to Interlock 1 Interlock 2 switch input status.

CLOSED: Interlock 2 switch closed; OPEN: Interlock 2 switch open This message also shows the function, if any, assigned to Interlock 2

Interlock 3 switch input status. CLOSED: Interlock 3 switch closed; OPEN: Interlock 3 switch open This message also shows the function, if any, assigned to Interlock 3

Interlock 4 switch input status. CLOSED: Interlock 4 switch closed; OPEN: Interlock 4 switch open This message also shows the function, if any, assigned to Interlock 4

Interlock 5 switch input status. CLOSED: Interlock 5 switch closed; OPEN: Interlock 5 switch open This message also shows the function, if any, assigned to Interlock 5

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INTERLOCK 6: OPEN NOT USED

INTERLOCK 7: OPEN NOT USED

INTERLOCK 8: OPEN NOT USED

INTERLOCK 9: OPEN NOT USED

INTERLOCK 10: OPEN NOT USED

Interlock 6 switch input status. CLOSED: Interlock 6 switch closed; OPEN: Interlock 6 switch open This message also shows the function, if any, assigned to Interlock 6

Interlock 7 switch input status. CLOSED: Interlock 7 switch closed; OPEN: Interlock 7 switch open This message also shows the function, if any, assigned to Interlock 7

Interlock 8 switch input status. CLOSED: Interlock 8 switch closed; OPEN: Interlock 8 switch open This message also shows the function, if any, assigned to Interlock 8

Interlock 9 switch input status. CLOSED: Interlock 9 switch closed; OPEN: Interlock 9 switch open This message also shows the function, if any, assigned to Interlock 9

Interlock 10 switch input st atus. CLOSED: Interlock 10 switch closed; OPEN: Interlock 10 switch open This message also shows the function, if any, assigned to Interlock 10

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5 ACTUAL VALUES 5.5 A4 STATISTICS

5.5 A4 STATISTICS 5.5.1 DESCRIPTION

This page gives detailed information on the running time and accumulated number of various types of trips. Actual Values Page 4 is divided into two sections, TIMERS and COUNTERS.

5.5.2 TIMERS

PATH: ACTUAL VALUES

RUNNING TIME =

2338 HOURS

STOPPED TIME =

2 HOURS

tttt

A4 STATISTICS t TIMERS

The total accumulated time the motor has been running. Whenever Contactor A and/or B is closed, the motor is consider ed to be running.

This is the non-accumulated motor stopped time. This is the amount of time that the motor has been stopped since the last time it was running. This value will clear to zero the next time the motor is started.

5.5.3 COUNTERS

PATH: ACTUAL VALUES

tttt

INTERLOCK COUNTER = 34765 UNITS

A4 STATISTICS

COUNTERS

This is the total number of switch closures read by the MM2 on a programmable input that has been configured to INTERLOCK COUNTER.

NUMBER OF STARTS =26This is the total number of contactor operations. When the MM2

receives feedback into either contactor status input to confirm that one of the main contactors have closed, this counter will increment.

TOTAL TRIPS =

OVERLOAD TRIPS =

When the MM2 trips for any reason, this value is incremented. It is the sum of all of the individual causes of trip.

When an overload trip occurs, this value is incremented.

THERMISTOR TRIPS =2When a thermistor trip occurs, this value is incremented.

GROUND FAULT TRIPS=0When a ground fault trip occurs, this value is incremented.

SINGLE PHASE TRIPS=0When a single phase trip occurs, this value is incremented.

ACCELERATION TRIPS=0When a single phase trip occurs, this value is incremented.

UNDERCURRENT TRIPS=0When an undercurrent trip occurs, this value is incremented.

UNDERPOWER TRIPS:

When an underpower trip occurs, this value is incremented.

STALLED ROTOR TRIPS0If a stalled rotor trip occurs, this value is incremented.

CONTROL COMMAND TRIPS: 3

If a control trip occurs, this value is incremented (i.e. Plant Interlock, Local Isolator etc.)

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6 COMMUNICATIONS 6.1 MM2 MODBUS PROTOCOL

6 COMMUNICATIONS

The MM2 implements a subset of the Modicon Modbus RTU serial communication standard. The Modbus protocol is hardware-independ ent. That is, the phy sical layer can be any of a var iety of stan dard hardware configurations. This includes RS232, RS422, RS485, fibre optics, etc. Modbus is a single master / multiple slave type of protocol suitable for a multi-drop configuration as provided by RS485 hardware. The MM2 Modbus implementation employs two-wire RS485 hardware. Using RS485, up to 32 MM2s can be daisy-chained together on a single communication channel.

The MM2 is always a Modbus slave. They can not be programmed as Modbus masters. Computers or PLCs are commonly programmed as masters.

Modbus protocol exists in two versions: Remote Terminal Unit (RTU, binary) and ASCII. Only the RTU version is supported by t he MM2. Both monitori ng and control are possi ble usi ng read and wr it e register commands. Other commands are supported to provide additional functions.

The hardware or electrical interface in the MM2 is two-wire RS485. In a two-wire link, data is transmitted and received over the same two wires. Although RS485 two wire communication is bi-directional, the data is never transmitted and received at the same time. This means that the data flow is half duplex.

RS485 lines should be connected in a daisy chain configuration with terminating networks installed at each end of the link (i.e. at the master end and at the slave farthest from the master). The terminating network should consist of a 120Ω resistor in series with a 1 nF ceramic capacitor when used with Belden 9841 RS485 wire. Shielded wire should always be used to minimize noise. The shield should be connected to all of the MM2s as well as the master, then grounded at one location only. This keeps the ground potential at the same level for all of the devices on the serial link.

Polarity is important in RS485 communications. The '+' (positive) terminals of every device must be connected together.

NOTE

6.1 MM2 MODBUS PROTOCOL 6.1.1 OVERVIEW

6.1.2 ELECTRICAL INTERFACE

See Figure 2–6: RS485 TERMINATION on page 2–7 and Chapter 2: INSTALLATION for more information.

6.1.3 DATA FRAME FORMAT AND DATA RATE

One data frame of an asynchronous transmission to or from a MM2 typically consists of 1 start bit, 8 data bits, and 1 stop bit. This produces a 10 bit data frame. This is im portant for transmissi on through modems at high bit rates (11 bit data frames are not supported by Hayes modems at bit rates of greater than 300 bps). The MM2 has the capability of adding an odd or even parit y bit if necessary.

Modbus protocol can be implemented at any standard communication speed. The MM2 supports operation at 1200, 2400, 4800, 9600, 19200, and 57600 baud.

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6.1.4 DATA PACKET FORMAT

A complete request/response sequence consi st s of the f ollowi ng bytes (t ra nsmitted as separ ate data frames):

Master Request Transmission:

SLAVE ADDRESS: 1 byte FUNCTION CODE: 1 byte DATA: variable number of bytes dependi ng on FUNCTION CODE CRC: 2 bytes

Slave Response Transmission:

SLAVE ADDRESS: 1 byte FUNCTION CODE: 1 byte DATA: variable number of bytes dependi ng on FUNCTION CODE CRC: 2 bytes

SLAVE ADDRESS: This is the first byte of every transmission. This byte represents the userassigned address of the slave device that is to receive the message sent by the master. Each slave device must be assigned a unique address and only the addressed slave will respond to a transmission that starts with its address. In a master request transmission the SLAVE ADDRESS represents the address of the slave to which the request is being sent. In a slave response transmission the SLAVE ADDRESS represents the address of the slave that is sending the response. Note: A master transmission with a SLAVE ADDRESS of 0 indicates a broadcast command. Broadcast commands can be used only in certain situations; see Section 6.4: APPLICATIONS on page 6–14 for details.

FUNCTION CODE: This is the second byte of every transmission. Modbus defines function codes of 1 to 127. The MM2 implements some of these functions. See Section 6.1.8: MM2 SUPPORTED FUNCTIONS on page 6–4 details of the supported function codes. In a master request transmission

the FUNCTION CODE tells the slave what action to perform. In a slave response transmission the FUNCTION CODE tells the master what function was pe rf ormed as requ ested . If the high order bit o f the FUNCTION CODE sent from the slave is a 1 (i.e. if the FUNCTION CODE is > 127) then the slave did not perform the function as requested and is sending an error or exception response.

DATA: This will be a variable number of bytes depending on the FUNCTION CODE. This may be Actual Values, Setpoints, or addresses sent by the master to the slave or by the slave to the master. See Section 6.1.8: MM2 SUPPORTED FUNCTIONS for a description of the sup ported func ti ons and the data required for each.

CRC: This is a two byte error checking code.

6.1.5 ERROR CHECKING

The RTU version of Modbus includes a two byte CRC-16 (16 bit cycli c redund ancy check) wi th ever y transmission. The CRC-16 algorithm essentially treats the entire data stream (data bits only; start, stop and parity ignored) as o ne contin uous bi nary number. This number is first shifted left 16 bits and then divided by a characteristi c polyno mial (11000000000000101B). The 16 bit remainder of the division is appended to the end of t he trans mission, MSByte fir st. The res ulti ng message incl uding CRC, when divided by the same polynomial at the receiver will give a zero remainder if no transmission errors have occurred.

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6 COMMUNICATIONS 6.1 MM2 MODBUS PROTOCOL

If a MM2 Modbus slave device receives a transmission in which an error is indicated by the CRC-16 calculation, the slave device will not respond to the transmission. A CRC-16 error indicates than one or more bytes of the transmission were received incorrectly and thus the entire transmission should be ignored in order to avoid the MM2 performing any incorrect operation.

The CRC-16 calculation is an industry standard method used for error detection. An algorithm is included here to assist programmers in situations where no standard CRC-16 calculation routines are available.

6.1.6 CRC-16 ALGORITHM

Once the following algorithm is complete, the working register "A" will contain the CRC value to be transmitted. Note that this algorithm requires the characteristic polynomial to be reverse bit ordered. The MSBit of the charact erist ic polyno mial is drop ped sinc e it does not a f fec t the value of the r emain der. The following symbols are used in the algorithm:

—>: data transfer A: 16 bit working register AL: low order byte of A AH: high order byte of A CRC: 16 bit CRC-16 value i, j: loop counters (+): logical exclusive or operator Di: i-th data byte (i = 0 to N-1) G: 16 bit characteristic polynomial = 1010000000000001 with MSbit dropped and bit order

reversed shr(x): shift right (the LSbit of the low order byte of x shifts into a carry flag, a '0' is shifted into the

MSbit of the high order byte of x, all other bits shift right one location

The algorithm is:

1. FFFF hex —> A

2. 0 —> i

3. 0 —> j

4. Di (+) AL —> AL

5. j+1 —> j

6. shr(A)

7. is there a carry? No: go to 8. Yes: G (+) A —> A

8. is j = 8? No: go to 5. Yes: go to 9.

9. i+1 —> i

10.is i = N? No: go to 3. Yes: go to 11.

11.A —> CRC

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6.1.7 TIMING

Data packet synchronizatio n is mai ntained b y t iming con strai nts. The rec eiv ing device must measure the time between the reception of characters. If 3.5 character times elapse without a new character or completion of the packet, then the communication link must be reset (i.e. all slaves start listening for a new transmission from the master). Thus at 9600 baud a delay of greater than 3.5×1/

9600×10×=×3.65×ms will cause the communication link to be reset.

6.1.8 MM2 SUPPORTED FUNCTIONS

The following functions are supported by the MM2:

• FUNCTION CODE 01 - Read Coil Status

• FUNCTION CODE 03 - Read Setpoints and Actual Values

• FUNCTION CODE 04 - Read Setpoints and Actual Values

• FUNCTION CODE 05 - Execute Operation

• FUNCTION CODE 06 - Store Single Setpoint

• FUNCTION CODE 07 - Read Device Status

• FUNCTION CODE 08 - Loopback Test

• FUNCTION CODE 10 - Store Multiple Setpoints

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6 COMMUNICATIONS 6.2 MODBUS FUNCTIONS

6.2 MODBUS FUNCTIONS 6.2.1 FUNCTION CODE 01H

Modbus implementation: Read Coil Status MM2 implementation: Read Last Command Operation

This function code allows the master to read back which command operation was last performed using Modbus function code 05: force single coil/execute operation. Upon request of coil/operation status, the MM2 will set a bit corresponding to the last operation performed. The operation commands are in the Modbus Data Formats table under code F22.

Note: Operation 0 will b e set ( 1) if no o perati ons hav e been perf or med since t he MM2 has been p owered up.

For example, a request slave 17 t o re spond with stat us of 6 ope rat ions, s tarti ng at operati on 10, af te r performing command operation 13 (Manual Inhibit) has the following format:

Table 6–1: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 01H

MASTER TRANSMISSION BYTES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 01 read last command operation OPERATION STARTING ADDRESS 2 00 0A start at operation 10 NUMBER OF OPERATIONS TO READ 2 00 06 read 6 operations CRC 2 9E 9A CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 01 read last command operation BYTE COUNT 1 01 6 operations = 6 bits: only 1 byte required DATA 1 (see definition below) 1 08 bit set corresponding to command 13 CRC 2 54 83 CRC error code

The DATA 1 definition is as follows:

Data 1 = 08 (hex) = command operation #

00001000

N/A N/A 15 14 13 12 11 10

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6.2.2 FUNCTION CODE 03H

Modbus implementation: Read Holding Registers MM2 implementation: Read Setpoints and Actual Values

For the MM2 implementation of Modbus, this command can be used to read any setpoints ("holding registers") or actual v alu es ("i nput regi ste rs"). Hold ing a nd input r egi sters ar e 16 bit ( two by te) val ues transmitted high order byte first. Thus all MM2 Setpoints and Actual Values are sent as two bytes. The maximum number of registers that can be read in one transmission is 125. This function code is identical to function code 04.

The slave response to this function code is the slave address, function code, a count of the number of data bytes to follow, the data itself and the CRC. Each data item is sent as a two byte number with the high order byte sent first.

For example, consider a request for slave 17 to respond with 3 registers starting at address 006B. For this example the register data in these addresses is as follows:

Address Data

006B 022B 006C 0000 006D 0064

The master/slave packets have the following format:

Table 6–2: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 03H

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 03 read registers DATA STARTING ADDRESS 2 00 6B data starting at 006B NUMBER OF SETPOINTS 2 00 03 3 registers = 6 bytes total CRC 2 76 87 CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 03 read registers BYTE COUNT 1 06 3 registers = 6 bytes DATA 1 (see definition above) 2 02 2B value in address 006B DATA 2 (see definition above) 2 00 00 value in address 006C DATA 3 (see definition above) 2 00 64 value in address 006D CRC 2 54 83 CRC error code

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6 COMMUNICATIONS 6.2 MODBUS FUNCTIONS

6.2.3 FUNCTION CODE 04H

Modbus Implementation: Read Input Registers MM2 implementation: Read Setpoints and Actual Values

For the MM2 implementation of Modbus, this command can be used to read any setpoints ("holding registers") or actual v alu es ("i nput regi ste rs"). Hold ing and inp ut r egister s ar e 16 bit ( two byte) val ues transmitted high order byte first. Thus all MM2 Setpoints and Actual Values are sent as two bytes. The maximum number of registers that can be read in one transmission is 125. This function code is identical to function code 03.

The slave response to this function code is the slave address, function code, a count of the data bytes to follow, the data itself and the CRC. Each data item is sent as a two byte number with the high order byte sent first.

For example, request slave 17 to respond with 1 register starting at address 0008. For this example the value in this register (0008) is 0000.

Table 6–3: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 04H

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 04 read registers DATA STARTING ADDRESS 2 00 08 data starting at 0008 NUMBER OF ACTUAL VALUES 2 00 01 1 register = 2 bytes CRC 2 B2 98 CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 04 read registers BYTE COUNT 1 02 1 register = 2 bytes DATA (see definition above) 2 00 00 value in address 0008 CRC 2 78 F3 CRC error code

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6.2.4 FUNCTION CODE 05H

Modbus Implementation: Force Single Coil MM2 Implementation: Execute Operation

This function code allows the master to request a MM2 to per form specifi c command operations . The commands supported by the MM2 are listed in Section 6.4: APPLICATIONS on page 6–14.

For example, to request slave 17 to execute operation code 1 (reset), we have the following master/ slave packet format:

Table 6–4: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 05H

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 05 execute operation OPERATION CODE 2 00 01 operation code 1 CODE VALUE 2 FF 00 perform function CRC 2 DF 6A CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 05 execute operation OPERATION CODE 2 00 01 operation code 1

CODE VALUE 2 FF 00 perform function CRC 2 DF 6A CRC error code

The commands that can be performed by the MM2 using function code 05 can also be initiated by using function code 10.

See Section 6.2.8: FUNCTION CODE 10H on page 6–12 for an example of performing commands using function code 10.

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6 COMMUNICATIONS 6.2 MODBUS FUNCTIONS

6.2.5 FUNCTION CODE 06H

Modbus Implementation: Preset Single Register MM2 Implementation: Store Single Setpoint

This command allows the master to store a single setpoint into the memory of a MM2. The slave response to this function code is to echo the entire master transmission.

For example, request slave 17 to store the value 01F4 in setpoint address 1020. After the transmission in this example is complete, setpoints address 1020 will contain the value 01F4. The master/ slave packet format is shown below:

Table 6–5: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 06H

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 06 store single setpoint DATA STARTING ADDRESS 2 10 20 setpoint address 1020 DATA 2 01 F4 data for setpoint address 1020 CRC 2 8E 47 CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 06 store single setpoint DATA STARTING ADDRESS 2 10 20 setpoint address 1020 DATA 2 01 F4 data stored in setpoint address 1020 CRC 2 8E 47 CRC error code

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6.2.6 FUNCTION CODE 07H

Modbus Implementation: Read Exception Status MM2 Implementation: Read Device Status

This is a function used to quickl y read the s tatus of a sel ected devi ce. A shor t mess age length a llows for rapid reading of status. The status byte returned will have individual bits set to 1 or 0 depending on the status of the slave device. For this example, consider the following MM2 general status byte:

LSBit:

MSBit:

B0: Alarm condition = 1 B1: Trip condition = 1 B2: Internal fault = 1 B3: Auto mode selected = 1 B4: Contactor A N/O (input closed = 1, open = 0) B5: Contactor B N/O (input closed = 1, open = 0) B6: AUX Relay 1 Status B7: AUX Relay 2 Status

The master/slave packets have the following format:

Table 6–6: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 07H

MASTER TRANSMISSION BYTES EXAMPLE DE SCRIPTION

SLAVE ADDRESS 1 1 1 message for slave 17 FUNCTION CODE 1 07 read device status CRC 2 4C 22 CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 07 read device status DEVICE STATUS (see definition above) 1 2C status = 00101100 (in binary) CRC 2 22 28 CRC error code

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6 COMMUNICATIONS 6.2 MODBUS FUNCTIONS

6.2.7 FUNCTION CODE 08H

Modbus Implementation: Loopback Test MM2 Implementation: Loopback Test

This function is used to test the integr ity of the communication link. The MM2 will echo the request. For example, consider a loopback test from slave 17:

Table 6–7: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 08H

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 08 loopback test DIAG CODE 2 00 00 must be 00 00 DATA 2 00 00 must be 00 00 CRC 2 E0 0B CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 08 loopback test DIAG CODE 2 00 00 must be 00 00 DATA 2 00 00 must be 00 00 CRC 2 E0 0B CRC error code

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6.2.8 FUNCTION CODE 10H

Modbus Implementation: Preset Multiple Registers MM2 Implementation: Store Multiple Setpoints

This function code allows multiple Setpoints to be stored into the MM2 memory. Modbus "registers" are 16-bit (two byte) values transmitted high order byte first. Thus all MM2 setpoints are sent as two bytes. The maximum number of Setpoints that can be stored in one transmission is dependent on the slave device. Modbus allows up to a maximum of 60 holding registers to be stored. The MM2 response to this function code is to echo the slave addr ess, functi on code, start ing address , the number of Setpoints stored, and the CRC.

For example, consider a request for slave 17 to store the value 01F4 to setpoint address 1028 and the value 2710 to setpoint address 1029. After the transmission in this example is complete, MM2 slave 17 will have the following setpoints information stored:

Address Data

1028 01F4 1029 2710

The master/slave packets have the following format:

Table 6–8: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 10H

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 10 store setpoints

DATA STARTING ADDRESS 2 10 28 setpoint address 1028 NUMBER OF SETPOINTS 2 00 02 2 setpoints = 4 bytes total BYTE COUNT 1 04 4 bytes of data DATA 1 2 01 F4 data for setpoint address 1028 DATA 2 2 27 10 data for setpoint address 1029 CRC 2 33 23 CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 10 store setpoints DATA STARTING ADDRESS 2 10 28 setpoint address 1028 NUMBER OF SETPOINTS 2 00 02 2 setpoints CRC 2 C7 90 CRC error code

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6 COMMUNICATIONS 6.3 ERROR RESPONSES

6.3 ERROR RESPONSES 6.3.1 DESCRIPTION

When a MM2 detects an error other than a CRC error, a response will be sent to the master. The MSBit of the FUNCTION CODE byte will be set to 1 (i.e. the function code sent from the slave will be equal to the function code sent from the master plus 128). The following byte will be an exception code indicating the type of error that occurred.

Transmissions received from the master with CRC errors will be ignored by the MM2. The slave response to an error (other than CRC error) will be:

SLAVE ADDRESS: 1 byte FUNCTION CODE: 1 byte (with MSbit set to 1) EXCEPTION CODE: 1 byte CRC: 2 bytes

The MM2 implements the following exception response codes .

• 01 - ILLEGAL FUNCTION The function code transmitted is not one of the functions supported by the MM2.

• 02 - ILLEGAL DATA ADDRESS The address referenced in the data field t ransmitted b y the master is n ot an all owable address fo r the MM2.

• 03 - ILLEGAL DATA VALUE The value referenced in the data field transmitted by the master is not within range for the selected data address.

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6.4 APPLICATIONS 6 COMMUNICATIONS

6.4 APPLICATIONS 6.4.1 PERFORMING COMMANDS USING FUNCTION CODE 10H

Commands can be performed using function code 16 as well as f unct ion code 5. When usi ng FUNCTION CODE 16, the Command Function register must be written with a value of 5. The Command Operation register must be written with a valid command operation number. The Command Data registers must be written with valid data; this is dependent upon the command operation.

The commands supported by the MM2 are listed in Section 6.6: DATA FORM ATS on page 6–41 under code F22.

For example, consider a request for slave 17 to perform command operation 1 (RESET): The master/slave packets have the following format:

Table 6–9: MASTER/SLAVE PACKET FORMAT FOR PERFORMING COMMANDS

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 11 message for slave 17 FUNCTION CODE 1 10 store multiple setpoints DATA STARTING ADDRESS 2 11 60 setpoint address 1 160 NUMBER OF SETPOINTS 2 00 02 2 setpoints = 4 bytes total

BYTE COUNT 1 04 4 bytes of data DATA 1 2 00 05 data for address 1160 DATA 2 2 00 01 data for address 1161 CRC 2 76 87 CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 11 message from slave 17 FUNCTION CODE 1 10 store multiple setpoints DATA STARTING ADDRESS 2 11 60 setpoint address 1 160 NUMBER OF SETPOINTS 2 00 02 2 setpoints CRC 2 46 7A CRC error code

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6 COMMUNICATIONS 6.4 APPLICATIONS

6.4.2 STORING COMM ADDRESS USING THE BROADCAST COMMAND

The default setting for the communications address from the factory and after a 'Setpoint Dump' is OFF. The communication speed and parity default settings are 9600 baud, no parity. We have provided a facility to store the comms. address to any MM2 without using the keypad and display (typically chassis mount MM2s).

Make sure the master is transmitting to the MM2 at 9600 baud, no parity. After installing the MM2 and ensuring communications is hooked up, cycle control voltage to the MM2 you wish to set the address for. This will allow you to send a broadcast command with the new comms. address for the MM2. The address must be set within 2 minutes of cycling power. Once the new address is stored or the 2 minutes have elapsed, the MM2 will ignore all further attempts at changing the comms. address unless power is cycled again. The address is changed using a broadcast command to comms. address 0 and a command function code. Note: This procedure can be accomplished using the MM2PC

software. See Chapter 8: MM2PC® SOFTWARE for details.

For example, to store communications address 25 to a new MM2 without a display, we have the following master/slave packet format. The master/slave packets have the following format:

Table 6–10: MASTER/SLAVE PACKET FORMA T (BROADCAST)

MASTER TRANSMISSION BY TES EXAMPLE DESCRIPTION

SLAVE ADDRESS 1 00 broadcast command for all units FUNCTION CODE 1 10 store setpoints DATA STARTING ADDRESS 2 11 60 setpoints address 1160 NUMBER OF SETPOINTS 2 00 03 3 setpoints = 6 bytes total BYTE COUNT 1 06 6 bytes of data DATA 1 2 00 05 data for address 1160 DATA 2 2 00 10 data for address 1161 DATA 3 2 00 19 data for address 1162 CRC 2 0B 8C CRC error code

SLAVE RESPONSE BYTES EXAMPLE DESCRI PTION

SLAVE ADDRESS 1 00 message from slave responding FUNCTION CODE 1 10 store setpoints DATA STARTING ADDRESS 2 11 60 setpoint address 1 160 NUMBER OF SETPOINTS 2 00 03 3 setpoints

CRC 2 84 FB CRC error code

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6.4 APPLICATIONS 6 COMMUNICATIONS

6.4.3 USING THE USER DEFINABLE MEMORY MAP

The MM2 contains a User Definable area in the memory map. This area allows re-mapping of the addresses of any Actual Values or Setpoints registers. The User Definable area has two sections:

1. A Register Index area (memory map addresses 1280H-12F7H) that contains 120 Actual Values or Setpoints register addresses.

2. A Register area (memory map addresses 0100H-0177H) that contains the data at the addresses in the Register Index.

Register data that is separated in the rest o f the memory map may be re-mapped to adjacent registe r addresses in the User Definable Registers area. This is accomplished by writing to register addresses in the User Definable Register Index area. This allows for improved throughput of data and can eliminate the need for multiple read command sequences. The User Definable Register Index is stored as a setpoint and therefore it is “remembered” even when the power is removed.

For example, if the values of Phase A Current (register address 0031H) and DRIVE STATUS (register address 0023H) are required to be read from a MM2, their addresses may be re-mapped as follows:

1. Write 0031H to address 1280H (User Definable Register Index 0000) using function code 06 or

16.

2. Write 0023H to address 1281H (User Definable Register Index 0001) using function code 06 or

16.

The MM2PC

1. Select the Communication > Tr oubleshooting menu item.

2. At the bottom of the screen, under the title “User Memory Map Insertion (write)”, enter “1280” in

the first index address box.

3. In the values box put the address of the data you want to read, i.e. 0x0031 (Type 0x to indicate a hex address).

4. Press Send.

5. Press OK.

6. Repeat the above steps for the other data regist ers you want to r ead, changing the index addr ess each time.

It is now possible to read these two data registers with one read, at addresses 0100H, 0101H. Address 0100H will contain Phase A Current. Address 0x0101 will contain DRIVE STATUS.

software can be used to write these locations to the User Definable Register Index.

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6 COMMUNICATIONS 6.4 APPLICATIONS

6.4.4 USER DEFINABLE MEMORY MAP DEFAULT VALUES

For convenience default User Map values have been added. However, the User Definable Memory Map is still fully customizable. The defaults are separated into three sections. Regular Polling data items, data that is read when a Trip, Stop or Alarm occurs, and data that can be monitored as time permits.

Table 6–11: MM2 MEMORY MAP USER DEFINABLE OUTPUTS (Sheet 1 of 2)

REGULAR

MODICON

30021 20 0014 Gen Alarm Active Status Flags 1 F104 100 30022 21 0015 Gen Alarm Active Status Flags 2 F105 101 30023 22 0016 Interlock Alarm Active Status Flags F106 102 30027 26 001A Interlock Start Block Status Flags F106 103 30028 27 001B Trip Active Status Flags 1 F107 104 30029 28 001C Trip Active Status Flags 2 F108 105 30035 34 0022 Command Mode F6 106 30036 35 0023 Drive Status F7 107 30037 36 0024 Motor Mode F8 108 30049 48 0030 Phase Current Scale Factor F1 109 30050 49 0031 Phase A Current F1 10A 30051 50 0032 Phase B Current F1 10B 30052 51 0033 Phase C Current F1 10C 30053 52 0034 Ground Current F1 10D 30054 53 0035 Motor Load %FLC F1 10E 30055 54 0036 Thermal Capacity % F1 10F 30056 55 0037 Current Unbalance % F1 110

30017 16 0010 Switch Input Status F100 111 30020 19 0013 Operation Status Flags F103 112 30034 33 0021 Cause of Stop F5 113 30057 56 0038 Acceleration Time 0.1 x s F1 114 30058 57 0039 Last Starting Current F1 115 30059 58 003A O/L Time to Trip F1 116 30081 80 0050 Cause of Trip F9 117 30082 81 0051 Time to Reset min. F1 118 30083 82 0052 Pre Trip Phase A Current F1 119 30084 83 0053 Pre Trip Phase B Current F1 11A

Shading codes:

ADDRESS

DEC HEX

DESCRIPTION

Regular Polling Upon a Trip, Alarm, Stop Monitor as time permits

VALUE

RANGE

STEP

VALUE

UNITS

AND

SCALE

FORMAT

USER MAP

ADDRESS

DEFAULT

(HEX)

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6.4 APPLICATIONS 6 COMMUNICATIONS

Table 6–11: MM2 MEMORY MAP USER DEFINABLE OUTPUTS (Sheet 2 of 2)

REGULAR

MODICON

30085 84 0054 Pre Trip Phase C Current F1 11B 30086 85 0055 Pre Trip Ground Current F1 11C 30087 86 0056 Cause of Last Trip F1 11D 30062 61 003D Power (scaled) kW F21 11E 30063 62 003E Energy Used - high order 0.1 x kWhr F2 11F 30064 63 003F Energy Used - low order 0.1 x kWhr F2 120 30065 64 0040 Voltage V F1 121 30073 72 0048 Analog Input units F1 122 30089 88 0058 Running Time hr. F1 123 30090 89 0059 Stopped Time hr. F1 124 30097 96 0060 Number of Starts - high order F2 125 30098 97 0061 Number of Starts - low order F2 126 30099 98 0062 Total Trips F1 127 30100 99 0063 Overload Trips F1 128 30101 100 0064 Thermistor Trips F1 129 30102 101 0065 Ground Fault Trips F1 12A 30103 102 0066 Single Phase Trips F1 12B 30104 103 0067 Acceleration Time Trips F1 12C 30105 104 0068 Undercurrent Trips F1 12D 30106 105 0069 Underpower Trips F1 12E 30107 106 006A Stalled Rotor Trips F1 12F 30108 107 006B Control Command Trips F1 130 30109 108 006C Interlock Counter F1 131

Shading codes:

ADDRESS

DEC HEX

DESCRIPTION

Regular Polling Upon a Trip, Alarm, Stop Monitor as time permits

VALUE

RANGE

STEP

VALUE

UNITS

AND

SCALE

FORMAT

USER MAP

ADDRESS

DEFAULT

(HEX)

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6 COMMUNICATIONS 6.5 MEMORY MAP

6.5 MEMORY MAP 6.5.1 DESCRIPTION

The data stored in the MM2 is grouped into t w o areas: setpoints and actual values. Setpoints can be read and written by a master c omp uter. Actual Values can be read only. All Setpoints and Actual Values are stored as two byte values. That is, each register address is the address of a two byte value. Addresses are listed in hexadecimal. Data values (Setpoint ranges, increments, factory values) are in decimal.

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6.5 MEMORY MAP 6 COMMUNICATIONS

6.5.2 MEMORY MAP TABLE

Table 6–12: MODBUS MEMORY MAP (Sheet 1 of 21)

GROUP MOD-

Actual Values (Input Registers) Addresses - 0000-0FFF

PRODUCTID30001 0 0000 GE Product Device Code --- --- --- F1 60

STATUS 30017 16 0010 Switch Input Status --- --- --- F100 N/A

Notes: * – Maximum setpoint value and 65535 represent OFF

ICON

30002 1 0001 Hardware Version Code --- --- --- F4 current version 30003 2 0002 Main Software Version Code --- --- --- F1 current version 30004 3 0003 Modification File Number --- --- --- F1 mod. file no. 30005 4 0004 Boot Software Version Code --- --- --- F1 current version 30006 5 0005 Supervisor Processor Version Code --- --- --- F1 current version 30007 6 0006 GE Product Options --- --- --- F111 from order code 30008 7 0007 Serial Number char. 1 and 2 --- --- ASCII F10 char. 1 and 2 30009 8 0008 Serial Number char. 3 and 4 --- --- ASCII F10 char. 1 and 2 30010 9 0009 Serial Number char. 5 and 6 --- --- ASCII F10 char. 1 and 2 30011 10 000A Serial Number char. 7 and 8 --- --- ASCII F10 char. 1 and 2 30012 11 000B Manufacture Month/day --- --- --- F33 manuf. mo./day 30013 12 000C Manufacture year --- --- --- F34 manuf. year

30014 13 000D ...Reserved... ... ... ... ... ...

30015 14 000E Display Processor F/W Version Code F1 current version

30016 15 000F ...Reserved... ... ... ... ... ...

30018 17 0011 LED Status Flags 1 --- --- --- F101 N/A 30019 18 0012 LED Status Flags 2 --- --- --- F102 N/A 30020 19 0013 Operation Status Flags --- --- --- F103 N/A 30021 20 0014 General Alarm Active Status Flags 1 --- --- --- F104 N/A 30022 21 0015 General Alarm Active Status Flags 2 --- --- --- F105 N/A 30023 22 0016 Interlock Alarm Active Status Flags --- --- --- F106 N/A 30024 23 0017 General Alarm Pickup Status Flags 1 --- --- --- F104 N/A 30025 24 0018 General Alarm Pickup Status Flags 2 --- --- --- F105 N/A 30026 25 0019 Interlock Alarm Pickup Status Flags --- --- --- F106 N/A 30027 26 001A Interlock Start Block Status Flags --- --- --- F106 N/A 30028 27 001B Trip Active Status Flags 1 --- --- --- F107 N/A 30029 28 001C Trip Active Status Flags 2 --- --- --- F108 N/A 30030 29 001D Trip Pickup Status Flags 1 --- --- --- F107 N/A 30031 30 001E Trip Pickup Status Flags 2 --- --- --- F108 N/A 30032 31 001F Start Status Flags --- --- --- F109 N/A

** – 1/Phase Current Scale Factor x A *** – 101 represents unlimited † – Minimum setpoint value represents OFF ~* – 0.1 x A when Hi resolution mode is disabled; 0.01 x A when enabled

ADDRESS DESCRIPTION REGISTE

DEC HEX

R VALUE

RANGE

STEP

VALUE

UNITS

AND

SCALE

FOR-

MAT

FAC TO RY

DEFAULT

VALUE

(CONVERTED)

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GE MOTOR MANAGER 2 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

STARTER

CT/VT INPUTS

THERMISTOR

FAULT MODE

STATISTICS

PROGRAMMABLE MESSAGE

PREFERENCES

LOAD PROTECTION

STOP CONFIGURATION

ANALOG INPUT

PRESET COUNTERS AND TIMERS

S6 FACTORY DATA

MOTOR STATUS

A4 STATISTICS

COUNTERS