Siemens SAMMS-MV User Manual

SAMMS-MV

™

Siemens Advanced Motor Master System for Medium Voltage Motors

User's Manual

Manual No. MVC-9108

The information contained herein is general in nature and not intended for specific application purposes. It does not relieve the user of responsibility to use sound practices in application, installation, operation, and maintenance of the equipment purchased. Siemens reserves the right to make changes in the specifications shown herein or to make improvements at any time without notice or obligations. Should a conflict arise between the general information contained in this publication and the contents of drawings or supplementary material or both, the latter shall take precedence.

For the purpose of this manual a qualified person is one who is familiar with the installation, construction or operation of the equipment and the hazards involved. In addition, he has the following qualifications: (a) is trained and authorized to de-energize, clear, ground, and tag circuits

and equipment in accordance with established safety practices.

(b) is trained in the proper care and use of protective equipment such as

rubber gloves, hard hat, safety glasses or face shields, flash clothing, etc., in accordance with established safety practices.

IMPORTANT

QUALIFIED PERSON

These instructions do not purport to cover all details or variations in equipment, nor to 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 purposes, the matter should be referred to the local sales office.

The contents of this instruction manual shall not become part of or modify any prior or existing agreement, commitment or relationship. The sales contract contains the entire obligation of Siemens Energy & Automation, Inc. The warranty contained in the contract between the parties is the sole warranty of Siemens Energy & Automation, Inc. Any statements contained herein do not create new warranties or modify the existing warranty.

SUMMARY

Contents

1 Introduction .............................................2

1.1 About this Manual ............................................3

1.2 About the SAMMS-MV Device ..........................3

1.2.1 The SAMMS-MV Device Models ............4

1.2.2 Advanced Protection for Medium-Voltage

Motors ...................................................4

1.2.3 Overload Protection ...............................5

1.2.4 Programming Control Circuits ................5

1.2.5 Using the Standardized Control Panel....5

2 Installing the SAMMS-MV Device..........7

2.1 Receiving and Storing the SAMMS-MV Device. 7

2.2 Where to Locate the Device .............................7

2.3 Mounting the Device .........................................7

2.4 Connecting the Device .....................................7

2.4.1 Wiring Guidelines ...................................7

2.4.2 Grounding the Device ............................9

2.4.3 Connecting the Device to a Control Power

Source...................................................9

2.4.4 Connecting Input and Output Devices to

the SAMMS-MV Device .........................9

2.4.5 Communications Connection ................. 9

3 Operating the SAMMS-MV Device ......11

3.1 Password Protection.......................................11

3.2 Using the Reset/Test Push Button ..................11

3.2.1 Performing a Lamp Test .......................11

3.2.2 Performing an Overload Relay Test...... 11

3.3 Motor Control .................................................11

3.4 Output Devices ............................................... 12

3.5 Input Devices ..................................................12

3.6 Ladder Diagrams............................................13

3.6.1 Library of Standard Ladder Diagrams...13

3.6.2 Custom Ladder Diagrams ....................13

3.7 Incomplete Sequence ..................................... 17

3.8 Intelligent Reduced-Voltage

Starting (SAMMS-MVX Only)...........................17

3.9 Ridethrough Upon Loss of Power

(SAMMS-MVX Only) ........................................ 17

3.10 Overload Protection........................................ 17

3.11 Motor Ambient Temperature ...........................17

3.12 Protection Curves and Overload

Classes ..........................................................19

3.13 Ultimate Trip Level and Service Factor ............23

3.14 Phase Unbalance ........................................... 23

3.15 Dual Overload Protection................................ 23

3.16 Jam Protection (SAMMS-MVX Only) ...............23

3.17 Loss of Load Protection/Warning

(SAMMS-MVX Only) ........................................ 23

3.18 Process Current Warning (SAMMS-MVX Only) 23

3.19 Stator Protection.............................................23

3.20 Rotor Protection .............................................23

3.21 Repetitive Starts .............................................24

3.22 Start Inhibit .....................................................24

3.23 Cooling T ime Constants .................................24

3.24 Normalized Temperature Rise for Class B and

Class F Insulation ...........................................24

3.25 Ground Fault Detection .................................. 24

3.26 Autoreset After a Trip (SAMMS-MVX Only) ......26

3.27 Emergency Restarting .................................... 26

3.28 Using the Hand Held Communicator (HHC) ...26

3.28.1 The (F)unction Key ...............................26

3.28.2The LIST Key ....................................... 26

3.28.3 UP and DOWN Keys ............................28

3.28.4 Using the ENTER Key ..........................28

3.29 Using the SAMMS-MV Device

Functions ....................................................... 28

3.29.1Program Mode/Passwords...................32

3.29.2 SAMMS-MV Functions ........................32

4 Troubleshooting the SAMMS-MV

Device.....................................................40

Appendix A - Technical Specifications of the

SAMMS-MV Device...............................43

©Copyright 1994 Siemens Energy & Automation, Inc. ACCESS, SAMMS, SAMMS-MV, Series 81000, SEAbus, Power Monitor, Power Monitor PC, WinPM, and SIEServe are trademarks of Siemens Energy & Automation, Inc. Microsoft is a registered trademark and Windows is a trademark of Microsoft Corporation. IBM is a registered trademark of International Business Machines, Inc.

1 Introduction

The SAMMS-MV electronic motor control and protection de-

vice is designed and manufactured in accordance with the

latest applicable provisions of the National Electric Code,

Underwriters Laboratories Standards and Procedures, NEMA

Standards, and the National Electric Safety Code. You must

thoroughly read and understand this users manual before you

begin any work with the SAMMS-MV device. Successful appli-

cation and operation of this equipment depends as much upon

proper installation and maintenance by the user as it does upon

the careful design and fabrication by Siemens.

The purpose of this instruction manual is to assist the user in

developing safe and efficient procedures for the installation,

maintenance, and use of the equipment.

Contact the nearest Siemens representative if any additional

information is desired.

Qualified Person

For the purpose of this manual and product labels, a Qualified

Person is one who is familiar with the installation, construction

and operation of this equipment, and the hazards involved. In

addition, this person has the following qualifications;

Signal Words

The signal words Danger, Warning, and Caution used

in this manual indicate the degree of hazard that may be

encountered by the user. These words are defined as:

DangerIndicates an imminently hazardous situation which,

if not avoided, will result in death or serious injury.

WarningIndicates an potentially hazardous situation which,

if not avoided, could result in death or serious injury.

CautionIndicates an potentially hazardous situation which,

if not avoided, may result in minor or moderate injury.

Dangerous Procedures

In addition to other procedures described in this manual as

dangerous, user personnel must adhere to the following:

1. Always work on de-energized equipment. Always de-ener-

gize a breaker, or contactor, and remove it from the equip-

ment before performing any tests, maintenance, or repair.

2. Always perform maintenance on equipment employing springs

after the spring-charged mechanisims are discharged.

3. Always let an interlock device or safety mechanism perform

its function without forcing or defeating the device.

Field Service Operation

Siemens can provide compentent, well-trained Field Service

Representatives to provide technical guidance and advisory

assistance for the installation, overhaul, repair, and mainte-

nance of Siemens equipment, processes, and systems. Con-

tact regional service centers, sales offices, or the factory for

details.

 Training and authorization to energize, de-energize, clear,

ground, and tag circuits and equipment in accordance with

established safety practices.

 Training in the proper care and use of protective equipment

such as rubber gloves, hard hat, safety glasses, face shields,

flash clothing, etc., in accordance with established safety

procedures.

 Training in rendering first aid.

1 Introduction

1.1 About this Manual

This manual introduces you to the Siemens Advanced Motor

Master System (SAMMS-MV) motor protection and control

relay which incorporates protection designed for medium

voltage machines. This manual also contains information for

installing and operating the device, communicating with other

devices over the ACCESS electrical distribution communica-

tions system, and troubleshooting the device. This manual also

provides a helpful technical reference for you to use. Refer to

table 1.1 to determine which section of the manual contains the

information that you need.

These instructions prepare you to handle, install, operate and

maintain the SAMMS-MV device and the Hand-Held Commu-

nicator (HHC). The individual starters and controllers used are

designed for specific applications based upon your equipment

and needs. Instructions covering these starters and compo-

nents are not included in this manual. For this information, refer

to instructions and drawings furnished with your equipment, or

contact your Siemens representative. You must read these

instructions and determine applicability of your equipment.

Refer to the nameplate data on your controller and to the

electrical diagrams supplied with your controller to determine

applicability of your equipment.

1.2 About the SAMMS-MV Device

The SAMMS-MV device, shown in Figure 1.1, is a software-

configured electronic motor control and overload protection

device that incorporates protection tailored to the special

characteristics of medium voltage motors. The SAMMS-MV

system includes a microprocessor-based SAMMS-MV device

which receives signal inputs from a set of current transformers

(either 3-1Ø or 1-3Ø) and power input from a 12 volt tap on the

controllers control power transformer. To perform certain

monitoring and setup activities, a Hand-Held Communicator

(HHC) shown in Figure 1.2, is required. The SAMMS-MV device

is a multi-functional device offering the following:

 advanced motor protection for medium voltage motors

 pre-programmed control circuits

 standardized control panel with input/output devices replac-

ing conventional push-buttons, pilot lights and selector

switches

 diagnostics

 statistical motor data

 real-time metering

 local display of all motor and control circuit data

 open architecture communications using the ACCESS sys-

tem

Note: The SAMMS-MV device does not replace the disconnect

device (drawout contactor mounting or isolating switch) or the

contactor itself.

If you need to... ...refer to this section

learn about the SAMMS-MV device Section 1, Introduction

install the SAMMS-MV device Section 2, Installing the SAMMS-MV Device

operate the SAMMS-MV device Section 3, Operating the SAMMS-MV Device

operate the Hand-Held Communicator Section 3, Operating the SAMMS-MV Device

connect the SAMMS-MV device to the ACCESS

Section 2, Installing the SAMMS-MV Device

System

troubleshoot the SAMMS-MV device Section 4, Troubleshooting the SAMMS-MV Device

learn about the technical specifications of the

Appendix A, Technical Specifications of the SAMMS-MV Device

SAMMS-MV device

Table 1.1 Where to find information

1 Introduction

Figure 1.1 SAMMS-MV, front view

1.2.1 The SAMMS-MV Device Models

The SAMMS-MV device is available in two models: SAMMS-MVE

and SAMMS-MVX. Each model meets the various demands of

industrial and commercial specifications and installations. Table

1.2 compares the features of each model.

The SAMMS-MV device is designed for critical process control

where prevention of downtime is critical. It offers motor control

and protection along with motor diagnostic and motor/driven

equipment protection. Engineering and operating personnel

have access to important data enabling them to optimize

motor-driven equipment capabilities, maximize the process

system output and facilitate maintenance.

SAMMS-MVX is a full function model, applicable to all control

needs, from a simple across-the-line unit to a more compli-

cated reduced voltage scheme. It includes all of the functions

listed in table 3.7. Any of the standard control circuits listed in

table 3.3, or a custom circuit, may be downloaded. The

SAMMS-MVX device accepts up to four remote inputs, while

SAMMS-MVE accepts two remote inputs.

SAMMS-MVE is a model of SAMMS-MV tailored to across-the-

line (FVNR) applications. It provides all of the protective func-

tions of the SAMMS-MVX device, except that it has no jam

protection (F23), loss of load protection/alarm (F24), or process

current warning (F22) functions. Functions F3 and F5 associ-

ated with two-speed applications are not available. No provi-

sion for automatic reset (F8) is provided. SAMMS-MVE accepts

one remote input, and provides one output to actuate a single

contactor. An alarm contact is not available with SAMMS-MVE.

These remote inputs are compatible with all PLCs and electro-

mechanical remote control devices that have a 120VAC or

125VDC input signal.

1.2.2 Advanced Protection for

Medium-Voltage Motors

For advanced protection of medium voltage motors, the

SAMMS-MV device uses a motor model algorithm that continu-

ally calculates the stator winding and housing temperature as

well as the rotor temperature as a function of the motor rms

current. The motor model compares the calculated tempera-

ture to trip temperature values and provides a signal that trips

the motor off line when the motor reaches a trip temperature

value. The model closely emulates the heating and cooling of

the motor windings as well as the rotor and provides protection

against both transient and steady-state overload conditions.

1 Introduction

across-the-line starters to complicated reduced-voltage start-

ers. With optional software, the specified control circuit can be

loaded either from the library or from a modified version into the

microprocessors memory, in the factory or on site, using an

IBM®-PC compatible computer. If you would like to learn more

about this software package, refer to SAMMS Custom Soft-

ware Manual, Bulletin CP 3291.

Highly specialized control circuits can be developed and exist-

ing circuits can be modified using an optional IBM-PC compat-

ible software package. This software uses conventional engi-

neering symbols along with pull-down menus and a mouse to

draw ladder diagrams. When you have finished drawing the

diagram, the software translates the diagram into microproces-

sor machine code and downloads it into the SAMMS-MV

devices memory.

1.2.5 Using the Standardized Control Panel

The SAMMS-MV device can be used for local and/or remote

control. The SAMMS-MVE device provides two light bars, while

the SAMMS-MVX model provides three light bars. Each model

includes six pushbuttons with lights and tactile feedback. You

can program these light bars and pushbuttons for the various

functions of the control circuit used.

Figure 1.2 Hand-Held Communicator (HHC)

1.2.3 Overload Protection

The motor model offers the selection of overload classes 2

through 23.

The SAMMS-MV device offers more accurate motor protection

than traditional thermal overload and most electronic motor

protection devices. This prolongs motor life by eliminating

nuisance tripping for multiple restarts, and allowing for proper

cool down time when the motor winding temperature or rotor

temperature reaches a critically high value.

1.2.4 Programming Control Circuits

The SAMMS-MV device allows you to modify its configuration

by programming the microprocessor. The SAMMS-MV device

replaces conventional timers, overload relays, pushbuttons,

and selector switches.

SAMMS-MVE is preloaded with seven across-the-line control

circuits, and the desired control circuit can be selected using

the Hand-Held Communicator (HHC.) Alternatively, a custom

across-the-line circuit may be downloaded from a PC.

The test/reset button is used to test and reset the overload

function and to test the front panel lights.

Diagnostics

Eight diagnostic LEDs, located on the front panel, provide

information about conditions affecting the motor.

Statistical Data about the Motor

The microprocessors memory stores statistical data about the

motor and displays this data on the Hand-Held Communicator

(HHC).

Real-Time Metering Data

The Hand-Held Communicator displays real-time metering

data.

Local Displaying of Motor and Circuit Data

The HHC and the eight (8) diagnostic LEDs display motor and

control circuit data. The eight (8) diagnostic LEDs are located on

the front panel of the device.

Communicating with Other Devices

The SAMMS-MV device communicates with other devices via

the ACCESS system. When connected to the ACCESS system,

the SAMMS-MV device provides two-way communication with

the Power Monitor display and monitoring unit, an IBM PC-

compatible computer running the Power Monitor PC com-

munications and supervisory software or another supervisory

device. This ability allows you to control and monitor motors

from a centralized location. You can have remote access to all

SAMMS-MV data such as diagnostics, statistical data, real-

time metering, and controller status. If you would like to learn

more about the ACCESS system, refer to Installing the AC-

CESS System (manual no. SG6028).

A library of more than 40 typical control circuits exists for use

with SAMMS-MVX to meet applications ranging from simple

1 Introduction

SAMMS-MV Model SAMMS-MVE SAMMS-MVX

Application

Across-the-line (FVNR)

Reversing

Two-speed

Reduced voltage

Functions available (see table 3.7)

Ridethrough upon loss of power

Ground fault protection/alarm

Programmable alarm contact

Control circuits

Change settings requires password

Remote inputs

Outputs

Light bars

Table 1.2 SAMMS-MV models

X X

F0-F21 plus F25-F27 (except no

F3, F5, or F8)

No Yes

Yes Yes

No Yes

Seven (preloaded), selectable with

HHC. May download any custom

across-the-line control circuit

Yes Yes

One Four

One Three

Two Three

F0-F27

Any downloadable control circuit

2 Installing the SAMMS-MV Device

This section provides instructions for installing the SAMMS-MV device. You should adapt these instructions to suit the needs of your installation and equipment.

2.1 Receiving and Storing the SAMMS-MV Device

Thoroughly inspect the equipment before accepting the shipment from the transportation company. Compare each item received against the packing list and report any shortages or damaged equipment to the carrier.

If you are not going to install the SAMMS-MV device immediately, store it in a clean, dry location at ambient temperatures from -40° C to 85° C. The surrounding air should not contain any corrosive fumes or electrically conductive contaminants. The storage location should prevent condensation from forming within the equipment enclosure.

Note: Improper storage can cause equipment damage. Follow all storage instructions carefully. Failure to follow storage instructions will void the warranty.

2.2 Where to Locate the Device

You can locate the SAMMS-MV device and its associated devices in most industrial equipment environments. Unless the device is designed for specific requirements, you should install the SAMMS-MV device and its controller in an area where the following conditions exist:

• Ambient air must be free of dirt, combustible vapor, steam, electrically conductive or corrosive material.

• Area around the controller must provide access to the equipment for inspection, maintenance and operation.

2.3 Mounting the Device

The SAMMS-MV device mounts in a front door panel of the low voltage compartment of Siemens Series 81000™ medium voltage control (MVC) equipment. Mount the device in the normal low-voltage compartment associated with each medium voltage controller.

2.4 Connecting the Device

This section contains general guidelines that you should follow to connect the SAMMS-MV device. These guidelines include instructions for routing the wire, connecting the wire and grounding the device. Use these guidelines to install the SAMMS-MV device and its peripheral devices in a motor controller. Also use these guidelines to connect the motor controller to the motor.

When Siemens supplies a SAMMS-MV device as part of a motor controller, Siemens personnel install the wiring between the SAMMS-MV device and its peripheral devices in the motor

controller at the factory. The schematic diagram used contains three components: a connection diagram, a ladder diagram and a wiring diagram. The connection diagram illustrates the connections between the SAMMS-MV device and its peripheral devices. The ladder diagram illustrates the control circuit loaded into the SAMMS-MV device. Figure 2-1 shows a typical connection diagram for the SAMMS-MV device.

If Siemens does not supply the motor controller, the retrofitter or original equipment manufacturer should develop an equivalent electrical scheme.

2.4.1 Wiring Guidelines

You must observe the following guidelines when installing the SAMMS-MV device and connecting it with its peripheral devices.

Note: Failure to follow these guidelines can cause pickup of unwanted signals resulting in erratic operation and damage to the SAMMS-MV device.

Guideline 1: Separate the low-voltage (115 VAC or less) from the higher voltage conductors (460 VAC or higher) as much as possible. If low-voltage and medium-voltage wires must cross paths, make sure that they intersect at a right angle.

Guideline 2: To eliminate noise coupling, install all twisted pairs or wrap wires in such a way that a complete twist or wrap occurs at least every two inches.

Guideline 3: Place the low-voltage leads near the controller chassis.

Guideline 4: Use at least AWG 14 stranded copper wire for any low-voltage control wiring that you route outside the motor controller enclosure. Connections to the SAMMS-MV unit must be made with wire no larger than AWG 14.

Guideline 5: To avoid ground loops, ground each motor controller at a single ground point.

The top portion of the device contains 16 terminal locations for connecting control power leads, power supply, ground, inputs and outputs. (Refer to Figure 2.2 for a description of each terminal block assignment.)

2 Installing the SAMMS-MV Device

Figure 2.1 Full voltage non-reversing connection diagram

2 Installing the SAMMS-MV Device

2.4.2 Grounding the Device

As stated in Guideline 5, ground each motor controller at a single ground point. The grounding path to earth must be permanent and continuous. It must also be able to safely conduct ground fault currents that may occur in the system to ground through minimum impedance. The earth ground does not carry any current under normal conditions.

Note: Do not ground the SAMMS auxiliary current sensor (ACT) leads. (See figure 2.1.)

ALARM RELAY OUTPUT

115VAC (CPT INPUT)

12VAC (CPT INPUT) 12VAC (CPT INPUT)

Connect a ground bus to the chassis of each controller or to the chassis of the mounting equipment containing the earth ground through a grounding conductor.

Refer to Article 250 of the National Electrical Code for information about the types and sizes of wire conductors and methods for safely grounding electrical equipment and components.

2.4.3 Connecting the Device to a Control Power Source

The SAMMS-MV device requires a 12 VAC control power source in order to operate. Connect the control power source to terminals 5 and 6 located on the top of the relay.

2.4.4 Connecting Input and Output Devices to the SAMMS-MV Device

Connect your devices to the input and output connections on the SAMMS-MV device as illustrated in Figure 2.2.

2.4.5 Communications Connection

The SAMMS-MV device is equipped with an RS-485 communications port on the back of the device. The communications port allows connection to a communications module which

AC INPUT 4 AC INPUT 3 AC INPUT 2 AC INPUT 1

ACT RETURN

ACT INPUT 1 ACT INPUT 2 ACT INPUT 3

12345678 9 10 11 121314

SAMMS-MVX

LED on LED Flashing

LED

Current

> 40%

Unbalance Impending

> 110%

Trip Overload

Overload

Trip Incomplete

Trip

Sequence

Trip: Loss

External

of Load, or

TripAlarm

Jam, or RTDInput Trip: CPU

CPU

Failure or

Fault

Low Voltage

Ground

Trip

Fault

20 - 40% > 100%

< 110% Start

Inhibit

Alarm: Loss of Load or Prcs Current

Alarm

CPU Fault

Ground Fault

Ready

Current Unbalance

Impending Trip

Overload Trip

Incomplete Sequence

External Trip/Alarm

Reset/Test

15 16

RETURN OUTPUT 3 OUTPUT 2 OUTPUT 1

Figure 2.2 Terminal block assignments

2 Installing the SAMMS-MV Device

enables the SAMMS-MV to communicate with a remote supervisory device. Examples of the remote supervisory device include the Power Monitor display and monitoring unit, a standard personal computer running the Power Monitor PC communications and supervisory software, or Siemens Microsoft® Windows™ based SIEServe™ or WinPM™ software. These supervisory devices and programs can communicate with the SAMMS-MV device and allow it to operate in the

1 = 2 = GND 3 = + 4 = 12VDC+ 5 = 12VDC-

Top View

ACCESS electrical distribution communications system. The SAMMS-MV device connects to the SEAbus™ RS-485 via

the 5 pin plug on the Communications Module CM-1. The communications connections are illustrated in Figure 2.3. Refer to Installing the ACCESS System (manual no. SG-6028), for detailed information on connecting the SAMMS-MV device to the ACCESS network.

Proper make-up of 5 pin plug

Rear View

54321

Side View

5 pin plug

12345

1 2

Ribbon cable assembly

12Vdc(-) 12Vdc(+)

BLK

Comm Cable Comm Cable

SAMMS Communications Module CM-1

WHT

Shield

Figure 2.3 SAMMS-MV device communications connections

Rear view of the SAMMS-MV device

3 Operating the SAMMS-MV Device

This section explains how to operate the SAMMS-MV device.

3.1 Password Protection

Changing the settings of the SAMMS-MV device requires the

use of the Hand-Held Communicator (HHC) in the program

mode. To access the program mode, the user needs a

password. The SAMMS-MV device is shipped from the factory

with the password 0000. This password can be changed by

the user as described in section 3.29.1. Display of data using

the HHC does not require use of a password.

3.2 Using the Reset/Test Push Button

The Reset/Test pushbutton is located at the bottom center of

the front panel of the SAMMS-MV device as illustrated in Figure

3.1. You press this pushbutton to manually reset the SAMMS-MV

device after a fault or a trip condition occurs so that the motor

can be restarted. You can also use the Reset/Test pushbutton

to perform a lamp test or an overload relay test.

3.2.1 Performing a Lamp Test

To test the diagnostic LEDs, the control LEDs and the light bars

on the front panel, use the following procedure:

1. Press and hold the Reset/Test pushbutton for one to two

seconds.

3.2.2 Performing an Overload Relay Test

You may perform an overload relay test whenever the motor is

stopped. Use the following procedure to perform an overload

relay test.

1. Press and hold the Reset/Test pushbutton for at least the

duration of the class time. The class time is set by accessing

function F7. If you need to know how to access function F7,

see Section 3.29. If you release the Reset/Test pushbutton

before the duration of the class time, the device performs a

lamp test. If a fault or trip condition exists when you press the

Reset/Test pushbutton, the device performs a reset instead

of a lamp test.

2. Continue to hold down the Reset/Test pushbutton. After

reaching the class time duration, the Impending Trip and the

Phase Unbalance LEDs illuminate.

3. Release the Reset/Test pushbutton. The Impending Trip

and Phase Unbalance LEDs go off, and the Overload Trip

LED illuminates for two seconds. If the SAMMS-MV device

is tripped, it is automatically reset at the end of the overload

relay test.

Use the following procedure to reset the SAMMS-MV device

after a trip event.

1. Press the Reset/Test pushbutton.

2. Release the Reset/Test pushbutton. (All LEDs and light bars

on the front panel illuminate for two seconds.)

If a fault or trip condition exists when you press the Reset/Test

pushbutton, the device performs a reset instead of a lamp test.

Figure 3.1 Front view of SAMMS-MV

2. Release the Reset/Test pushbutton. The device resets the

alarm LEDs. If the motor has cooled sufficiently, you can

restart the motor.

3.3 Motor Control

You can configure the SAMMS-MV device to perform many

motor starting and control functions. These functions include

basic across-the-line, to more complicated reversing, two-

speed, and reduced-voltage starting. The SAMMS-MV device

stores in its memory the executable code representing the

ladder diagram for the users control application. The

SAMMS-MV device and ladder diagram code replace the

conventional control logic defined by wired interconnection of

electromechanical timers, control relays, pushbuttons, selector

switches, and pilot lights. A library of over 40 standard ladder

diagrams available for the SAMMS-MV device covers most

applications. In addition to the standard ladders, you can

construct custom ladder diagrams, using optional software, to

handle special applications.

Figures 3.2 and 3.3 illustrate the ladder symbols representing

input and output devices available for the SAMMS-MV device.

The circular symbols represent output devices such as contactor

coil drivers, pilot LEDs on the front panel of the SAMMS-MV

device, software time-delay relays and software control relays.

All other symbols represent input devices such as software

auxiliary contacts, remote AC inputs, front-panel pushbuttons,

and software timer instantaneous and timed contacts.

3 Operating the SAMMS-MV Device

STATE

LED On Flashing

Current

Unbalance

> 40% 20 - 40%

Impending Trip > 110% > 100% - <110%

Overload Trip Trip Start Inhibit

Incomplete

Sequence

Trip

External

Trip/Alarm

Trip: Loss of Load

or Jam or RTD

Alarm: Loss of

Load or Process

Current

CPU Fault Trip: CPU Failure or

Low Voltage

Ground Fault Trip Alarm

Light bar (L1) Stop or Off Off Delay Timer

Timing

Light bar (L2) Start, On, Forward,

Low Speed, Right

On Delay Timer

Timing

Light bar (L3) Reverse, High

Speed, Left

On Delay Timer

Timing

3.4 Output Devices

You can use the following SAMMS-MV output devices:

AC Outputs

The SAMMS-MVX device provides up to three AC coil drivers

capable of driving contactors up to size H6, while SAMMS-MVE

provides one coil driver.

Control Relays

The device provides up to eight software-controlled relays.

These relays are helpful in local two-wire and other applications

requiring maintained contacts.

Timing Relays

The SAMMS-MV device contains four internal software timing

relays. You can configure all four timers as on-delay timers;

however, if needed, you can configure the two adjustable timers

(timing relays TR1 and TR2) as either on-delay or off-delay

timers. Using the Hand Held Communicator, you can program

timing relays TR1 and TR2 from 0 through 200 seconds

(functions F13 and F14). Timing relay TR3 has a fixed 1 second

delay, and timing relay TR4 has a fixed 30 seconds delay. Table

3.1 illustrates the type of timers used on the device and their

ranges.

Timer Type Time (in seconds)

TR1 Programmable on-delay or

off-delay

TR2 Programmable on-delay or

off-delay

TR3 Fixed on-delay 1

0 - 200

Front Panel Pushbuttons

The SAMMS-MV device has six front-panel pushbuttons for

local control of the device. You must use pushbutton 1 (PB1) for

stopping the motor. You must use three of the pushbuttons

(PB4-PB6) for the Hand, Off and Auto functions if these

functions are used in your configuration. If these functions are

not used, you may use PB4-PB6 for other functions. You can

configure the other two pushbuttons (PB2 and PB3) at your

discretion. Refer to Figure 3.4 for assignment of pushbuttons.

Insert labels are used to identify the function associated with

each pushbutton or light bar.

Software Auxiliary Contacts

Any number of internal (software) auxiliary contacts can be

configured. These contacts show either a normally open (NO)

or normally closed (NC) status. You can set up these auxiliary

contacts using the SAMMS-MV software. Through the

SAMMS-MV software, the pilot LEDs also have auxiliary con-

tacts.

TR4 Fixed on-delay 30

Table 3.1 Types of software tming relays

Pilot LEDs

The SAMMS-MVX device contains three light bars on the front

panel, while the SAMMS-MVE contains two light bars. Light bar

L1 is reserved and must be used as the STOP or OFF LED. You

can configure L2 and L3 at your discretion. The Hand, Off and

Auto LEDs correspond to the Hand, Off and Auto pushbuttons

on the front panel as illustrated in Figure 3.4. You can use the

Incomplete Sequence LED in reduced-voltage applications or

to verify contactor operation. Refer to Figure 3.4 for the location

of the LEDs and Table 3.2 for a description of the LED states.

Flashing Pilot LEDs

The front panel contains two or three flashing light bars that

indicate various conditions such as on-delay timing. These

flashing light bars, L1, L2 and L3 as defined above, indicate

different output devices if they are flashing rather than if they are

on constantly. Refer to Figure 3.4 for an illustration of pilot LEDs.

3.5 Input Devices

You can use the following input devices with the SAMMS-MV

device.

Remote AC Inputs

For SAMMS-MVX you can use four 120 VAC or VDC inputs for

remote control, or you can use one input for SAMMS-MVE.

Table 3.2 Description of pilot LEDs

Software Timer Inputs

Each timer has an unlimited number of normally open (NO) and

normally closed (NC) contacts. Timers configured as on-delay

timers have an unlimited supply of normally open timed-closed

(NOTC), and normally closed timed-open (NCTO) contacts.

Timers configured as off-delay timers have an unlimited supply

of normally open timed-open (NOTO), and normally closed

timed-closed (NCTC) contacts.

Communications Inputs

A serial, RS-485 communications port is located on the back of

the device for external communications.

3 Operating the SAMMS-MV Device

The communications inputs must be included in the ladder logic

(control circuit).

3.6 Ladder Diagrams

3.6.1 Library of Standard Ladder Diagrams

The SAMMS-MV library of more than 40 ladder diagrams

covers most standard motor control applications. Table 3.3 lists

the standard control circuits and the input and output assign-

ments for the library. You can use the library with the following

starter types:

• across-the-line, non-reversing

• across-the-line, reversing

• two-speed, two winding

• two-speed, one-winding, constant or variable torque

• two-speed, one-winding, constant horsepower

• reduced-voltage, autotransformer

• reduced-voltage, reactor

For each starter type, the library includes seven control types:

• local two-wire

• local three-wire

• local three-wire, remote two-wire

• local two-wire, remote two-wire

• local three-wire, remote three-wire

• remote two-wire

• remote three-wire

SAMMS-MVE has seven preloaded circuits (ladder diagrams)

for use with across-the-line (FVNR) applications. SAMMS-MVX

may be used with any of the circuits.

For details on the library of standard ladder diagrams, refer to

the SAMMS Standard Circuit Manual.

3.6.2 Custom Ladder Diagrams

For special motor control applications not covered by the library

of standard ladders, you can construct custom ladder dia-

grams using the input and output devices and their associated

symbols for the SAMMS-MV device. Siemens personnel can

build these custom ladder diagrams or you can build your own.

You can purchase an optional IBM PC-compatible software

package to develop custom ladder diagrams for special control

applications. The package also includes a library of standard

symbols. The package enables you to reconfigure existing

SAMMS-MV devices to meet changing plant needs. Refer to

the Custom Software Manual for the SAMMS device, Bulletin

CP 3291.

Figure 3.2 Ladder symbols used with the SAMMS-MV device (sheet 1)

3 Operating the SAMMS-MV Device

Figure 3.3 Ladder symbols used with the SAMMS-MV device (sheet 2)

12345678 9 10 11 12

STOP or OFF

SAMMS-MVX

LED on LED Flashing

LED

VARIABLE

Current Unbalance

Impending Trip

Overload Trip

Incomplete Sequence

External TripAlarm

CPU Fault

Ground Fault

> 40%

> 110%

Overload

VARIABLE

Trip Trip: Loss

of Load,or Jamor RTDinput

Trip: CPU Failure or Low Voltage

Trip

20 - 40% > 100%

< 110% Start

Inhibit

Alarm: Loss of Load or Prcs Current

Alarm

CPU Fault

Ground Fault

Ready

Current Unbalance

Impending Trip

Overload Trip

Incomplete Sequence

External Trip/Alarm

Reset/Test

15 16

PB6

AUTO or VARIABLE

PB5

OFF or VARIABLE

PB4

HAND or VARIABLE

PB3

PB2

PB1

VARIABLE

STOP or OFF

Figure 3.4 Assignment of pushbuttons and light bars

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