Schneider Electric Modbus, Micrologic Data Bulletin

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units

Class 0613

Data Bulletin

0613IB1201 06/2012

Retain for future use.

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Table of Contents

Table of Contents

List of Tables: ...................................................................................................................... 5

SECTION 1: MICROLOGIC COMMUNICATION SYSTEM ...................................................................................................... 9

Introduction ................................................................................................. 9

List of Abbreviations .................................................................................... 9

Communication System Parameters .......................................................... 9

Communication System Components ....................................................... 10

Micrologic A Trip Units ........................................................................ 10

Micrologic P and H Trip Units .............................................................. 10

Breaker Communication Module (BCM) .............................................. 10

Communication Switches .................................................................... 10

24 Vdc Control Power ......................................................................... 11

Daisy Chain 4-Wire Modbus Network ................................................. 11

Cradle Communication Module (CCM) ............................................... 11

Communicating Shunt Trip and Shunt Close Coils ............................. 11

Ethernet Gateway or Circuit Monitor ................................................... 11

Micrologic Trip Unit, BCM and CCM ................................................... 12

BCM to Daisy Chain ............................................................................ 13

BCM and CCM .................................................................................... 14

Modbus TCP / IP Communication ....................................................... 14

Standard Wiring Practices ........................................................................ 15

Communication System ...................................................................... 15

System Problems ...................................................................................... 16

Troubleshooting ........................................................................................ 16

Addresses, Baud Rate, and Parity Settings .............................................. 17

Micrologic A Trip Unit .......................................................................... 17

Micrologic P and H Trip Unit ................................................................ 18

SECTION 2: COMMUNICATION ARCHITECTURE ............................................................................................................... 19

Introduction ............................................................................................... 19

Module ................................................................................................. 19

Command Interface ............................................................................. 19

Modbus Functions ..................................................................................... 20

Breaker Communication Module: @ Address xx ................................ 20

Communication Profile ........................................................................ 20

Simplified Open/Close Command ....................................................... 20

Cradle Communication Module: @ Address xx + 50 .......................... 21

Metering Module: @ Address xx + 200 ............................................... 21

Protection Module: @ Address xx + 100 ............................................. 23

SECTION 3: COMMAND INTERFACE .................................................................................................................... 24

Operating Principle ................................................................................... 24

Send Commands in Shared Mode ............................................................ 25

Send Commands in Protected Mode ........................................................ 26

Optimize Sending of Commands .............................................................. 28

Remote Configuration ............................................................................... 28

Example of a Remote Parameter-Setting Sequence .......................... 30

SECTION 4: ACCESS TO FILES .................................................................................................................... 31

Introduction ............................................................................................... 31

Event Logs ................................................................................................ 31

Wave Form Capture (WFC) ...................................................................... 32

Event Log of the Breaker Communication Module @ Address xx ............ 32

Event Log of the Protection Module @ Address xx + 100 ...............................34

Event Log of the Metering Module @ Address xx + 200 .......................... 36

Modbus® Communications System for Micrologic® A, P, and H Trip Units 0613IB1201 Table of Contents 06/2012

Maintenance Event Logs of the Protection Module

@ Address xx + 100 .................................................................................. 38

Maintenance Event Log of the Metering Module .......................................40

Min-Max Event Log of the Metering Module

@ Address xx + 200 .................................................................................. 42

Wave Form Capture ..................................................................................44

Fault Wave Form Capture ......................................................................... 46

SECTION 5: MODBUS FUNCTIONS .................................................................................................................... 48

Introduction ...............................................................................................48

Modbus / JBus Protocol ............................................................................48

Modbus Exception Responses .................................................................. 48

Standard Modbus Functions ..................................................................... 49

Advanced Modbus Functions .................................................................... 51

APPENDIX A: REGISTERS .................................................................................................................... 52

Formats ..................................................................................................... 52

Table of Registers ..................................................................................... 55

Structure of the Table .......................................................................... 55

Scale Factors .......................................................................................55

Breaker Communication Module @ Address xx .................................. 57

Cradle Communication Module @ Address xx + 50 ............................62

Metering Module @ Address xx + 200 ................................................64

Protection Module @ Address xx + 100 .............................................. 83

Advanced Protection Settings ............................................................. 94

Communication Profile @ Address xx ...............................................112

Activation of the Communication Profile ...................................... 112

I/O Status..................................................................................... 112

Metering....................................................................................... 115

List of Commands ...................................................................................121

Cradle Communication Module Commands @ Address xx + 50 ......121

Breaker Communication Module Commands @ Address xx ............ 122

Metering Module Commands @ Address xx + 200 ........................... 124

Protection Module Commands @ Address xx + 100 ......................... 126

Send Commands in Shared Mode Simplified Open / Close ..............127

Send Commands in Protected Mode .................................................128

Remotely OPEN the Circuit Breaker Commands ..............................129

Remotely CLOSE the Circuit Breaker Commands ............................ 130

Synchronize the Clocks Commands .................................................. 131

Remotely Configure and Set Commands .......................................... 132

Run Remote Resets / Preset Commands ......................................... 134

Manage the Event Logs— Breaker

Communication Module Commands ................................................. 135

Manage the Event Logs—Metering Module Commands ................... 136

Manage the Event Logs— Configure Analog Pre-Defined Alarm n°1:

Over Current Phase A Commands ....................................................137

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 List of Tables

List of Tables

Table 1: External 24 Vdc Control Power Supply Characteristics ............................................................. 11

Table 2: Breaker Communication Module Registers ............................................................................... 20

Table 3: Cradle Communication Module Registers ................................................................................. 21

Table 4: Metering Module Registers ........................................................................................................ 22

Table 5: Protection Module Registers...................................................................................................... 23

Table 6: Command Interface Registers................................................................................................... 25

Table 7: Shared Mode Registers in the Command Interface................................................................... 25

Table 8: Protected Mode Registers in the Command Interface............................................................... 26

Table 9: Command Result Codes............................................................................................................ 26

Table 10: Read-Accessed Commands ...................................................................................................... 27

Table 11: Descriptor of the Event Log in the Breaker Communication Module ......................................... 32

Table 12: Format of Records in the Event Log of the Breaker Communication Module............................ 33

Table 13: Events in the Event Log of the Breaker Communication Module............................................... 33

Table 14: Descriptor of the Event Log in the Protection Module................................................................ 34

Table 15: Format of Records in the Event Log of the Protection Module .................................................. 35

Table 16: Events in the Event Log of the Protection Module..................................................................... 35

Table 17: Descriptor of the Event Log in the Metering Module.................................................................. 36

Table 18: Format of Records in the Event Log of the Metering Module .................................................... 37

Table 19: Events in the Event Log of the Metering Module ....................................................................... 37

Table 20: Descriptor of the Maintenance Event Log in the Protection Module .......................................... 38

Table 21: Format of Records in the Maintenance Event Log of the Protection Module............................. 39

Table 22: Descriptor of the Maintenance Event Log in the Metering Module ............................................ 40

Table 23: Format of Records in the Maintenance Event Log of the Metering Module............................... 41

Table 24: Descriptor of the Min-Max Event Log in the Metering Module ................................................... 42

Table 25: Format of Records in the Min-Max Even Log of the Metering Module....................................... 43

Table 26: Descriptor of the Wave Form Capture in the Metering Module.................................................. 44

Table 27: Format of Records in the Wave Form Capture of the Metering Module .................................... 45

Table 28: Descriptor of the Fault Wave Form Capture in the Protection Module ...................................... 46

Table 29: Format of Records in the Fault Wave Form Capture of the Protection Module ......................... 47

Table 30: Read Functions.......................................................................................................................... 49

Table 31: Write Functions.......................................................................................................................... 49

Table 32: Diagnostic Functions.................................................................................................................. 49

Table 33: Example of an Advanced Modbus Function .............................................................................. 51

Table 34: Trip Record Fields...................................................................................................................... 53

Table 35: Alarm Record Fields .................................................................................................................. 53

Table 36: Basic Protections ....................................................................................................................... 54

Table 37: Advanced Protections................................................................................................................ 54

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 List of Tables 06/2012

Table 38: Digital Alarms.............................................................................................................................54

Table 39: Scale Factors ............................................................................................................................. 55

Table 40: Configuration.............................................................................................................................. 57

Table 41: Identification............................................................................................................................... 57

Table 42: Diagnostics Counters and Password ......................................................................................... 58

Table 43: Metering / Protection Module Event Notification ........................................................................58

Table 44: Cause of Tripping....................................................................................................................... 59

Table 45: Circuit Breaker Status, Auto / Manu ...........................................................................................60

Table 46: List of Possible Values for Register 661 (Circuit Breaker

Status) in the Breaker Communication Module .......................................................................... 61

Table 47: Time Stamping...........................................................................................................................61

Table 48: Configuration.............................................................................................................................. 62

Table 49: Identification............................................................................................................................... 62

Table 50: Diagnostics Counters and Password ......................................................................................... 62

Table 51: Cradle Status ............................................................................................................................. 63

Table 52: Time Stamping...........................................................................................................................63

Table 53: Voltages ..................................................................................................................................... 64

Table 54: Currents ..................................................................................................................................... 65

Table 55: Power.........................................................................................................................................65

Table 56: Power Factor.............................................................................................................................. 66

Table 57: Frequency .................................................................................................................................. 66

Table 58: Fundamental .............................................................................................................................. 67

Table 59: Total Harmonic Distortion........................................................................................................... 68

Table 60: Energy........................................................................................................................................70

Table 61: Demand Current.........................................................................................................................70

Table 62: K-Factor Demand....................................................................................................................... 71

Table 63: Demand Power .......................................................................................................................... 71

Table 64: Time Stamping...........................................................................................................................72

Table 65: Configuration.............................................................................................................................. 73

Table 66: Spectral Components (Odd Rank) ............................................................................................. 75

Table 67: Spectral Components (Even Rank)............................................................................................77

Table 68: Analog Pre-Defined Alarms........................................................................................................ 79

Table 69: Characteristics of the Protection Module ...................................................................................83

Table 70: Basic Protections Settings (Long-Time Protection-Alarm N° 1000 Ir)........................................ 84

Table 71: Basic Protections Settings (Short-Time Protection-Alarm N° 1001 Isd)..................................... 85

Table 72: Basic Protections Settings (Instantaneous Protection-Alarm N° 1002 Ii)................................... 86

Table 73: Basic Protections Settings (Ground-Fault Protection-Alarm N° 1003 Ig) ................................... 87

Table 74: Basic Protections Settings (Earth-Leakage Protection Alarm N° 1004 Idelta n) ........................ 88

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 List of Tables

Table 75: Protection Module Measurements ............................................................................................. 89

Table 76: Status of the Protection Module................................................................................................. 90

Table 77: Time Stamping and Trip / Alarm History .................................................................................... 91

Table 78: Trip History................................................................................................................................. 91

Table 79: Alarm History ............................................................................................................................. 92

Table 80: Micrologic Configuration ............................................................................................................ 93

Table 81: Ground-Fault Alarm—Alarm N°1014 (I

Protection) .................................................................. 94

Table 82: Earth-Leakage Alarm—Alarm N°1015 (IΔn Protection) ............................................................. 95

Table 83: Current Unbalance—Alarm N°1016 (I

Table 84: Maximum Current—Alarm N°1017 (I

Table 85: Maximum Current—Alarm N°1018 (I

Table 86: Maximum Current—Alarm N°1019 (I

Table 87: Maximum Current—Alarm N°1020 (I

Table 88: Minimum Voltage—Alarm N°1021 (V

Table 89: Maximum Voltage—Alarm N°1022 (V

Table 90: Voltage Unbalance—Alarm N°1023 (V

Table 91: Reverse Power—Alarm N°1025 (rP

Table 92: Minimum Frequency—Alarm N°1026 (F

Table 93: Maximum Frequency—Alarm N°1027 (F

Protection) .............................................................. 96

unbal

Protection)............................................................... 97

A max

Protection)............................................................... 98

B max

Protection) .............................................................. 99

C max

Protection) ............................................................ 100

N max

Protection) ............................................................... 101

min

Protection).............................................................. 102

max

Protection) .......................................................... 103

unbal

Protection)................................................................. 104

max

Protection)........................................................... 105

min

Protection) ......................................................... 106

max

Table 94: Phase Rotation Alarm—Alarm N° 1028................................................................................... 107

Table 95: Load Shedding and Reconnection Based on Current—Alarm N°1029 ................................... 108

Table 96: Load Shedding and Reconnection Based on Power—Alarm N°1030 ..................................... 109

Table 97: Relay Configuration M2C/M6C ................................................................................................ 110

Table 98: Circuit Breaker ......................................................................................................................... 112

Table 99: Input......................................................................................................................................... 113

Table 100: Tripping Cause......................................................................................................................... 113

Table 101: Alarm Setpoint ......................................................................................................................... 114

Table 102: Currents ................................................................................................................................... 115

Table 103: Maximum Values of Currents................................................................................................... 115

Table 104: Voltages................................................................................................................................... 115

Table 105: Frequency................................................................................................................................ 116

Table 106: Power....................................................................................................................................... 116

Table 107: Energy ..................................................................................................................................... 117

Table 108: Current Demand .......................................................................................................

Table 109: Power Demand ........................................................................................................................ 117

Table 110: Maximum Values of Voltages .................................................................................................. 118

Table 111: Power Factor............................................................................................................................ 118

Table 112: Total Harmonic Distortion ........................................................................................................ 119

............... 117

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 List of Tables 06/2012

Table 113: Available and Reserved Registers ........................................................................................... 119

Table 114: Basic Protection Settings ......................................................................................................... 119

Table 115: Circuit Breaker ID..................................................................................................................... 120

Table 116: Miscellaneous .......................................................................................................................... 120

Table 117: Cradle Communication Module Commands ............................................................................ 121

Table 118: Breaker Communication Module Commands ..........................................................................122

Table 119: Metering Module Commands................................................................................................... 124

Table 120: Protection Module Commands ................................................................................................. 126

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 1—Micrologic Communication System

Section 1—Micrologic Communication System

Introduction The Modbus communication option makes it possible to remotely use all the

functions of a MasterPact™, PowerPact™, or Compact™ circuit breaker, its Micrologic trip unit, and all its options.

Remote operations are based on a secure communication architecture. The Modbus communication system may be used to interconnect the control units (A, P, or H) and a supervisor, and a PLC or Modbus master. The connection uses an RS485 physical link and the Modbus-RTU protocol.

List of Abbreviations BCM – Breaker Communication Module

CCM – Cradle Communication Module

HMI – Human Machine Interface (Control Pad)

LED – Light Emitting Diode

MM – Trip Unit Metering Module

PIF – Product Interface Module

PLC – Programmable Logic Controller

PM – Trip Unit Protection Module

RS485 – Specific Type of Communication System

RTU – Remote Terminal Unit

SMS – System Management Software

TCP / IP – Transmission Control Protocol / Internet Protocol

Communication System Parameters

Micrologic trip units use a system consisting of:

• 4-wire Modbus,

• RTU, RS485 network,

• master / slave (Micrologic trip units are always slaves),

• any Modbus software (not proprietary),

• daisy chain using Belden

recommended).

shielded / twisted cable (8723

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 1—Micrologic Communication System 06/2012

Communication System Components

Circuit breakers that have Micrologic trip units are Powerpact, Compact, and Masterpact.

The communication system consists of:

• Micrologic trip units (A, P, or H models are capable of communication),

• Breaker Communication Module (BCM),

• communication switches that report circuit breaker status (open, closed,

tripped, ready to close) into the BCM,

• 24 Vdc control power,

• daisy chain 4-wire Modbus network,

• drawout circuit breakers also have cradle communication module

(CCM),

• communicating shunt trip and shunt close coils,

• ethernet gateway or circuit monitor to allow Modbus TCP / IP

communication.

Micrologic A Trip Units • Trip units require 50 mA at 24 Vdc control power. Control power source

to the trip unit must be isolated from the 24 Vdc control power to the BCM. The positive or negative output of the power supply must not be earth grounded. The DC output of the 24 Vdc power supply must also be isolated from its input. See External 24 Vdc Control Power Supply Characteristics on 11.

• Micrologic A trip units control power connections to F1 (-) and F2 (+).

• See the trip unit manual and the Masterpact NT/NW Universal Power

Circuit Breakers catalog for specific information about the trip unit and other components.

Micrologic P and H Trip Units • Micrologic P or H trip units require 100 mA at 24 Vdc control power.

Control power source to the trip unit must be isolated from the 24 Vdc control power to the BCM. The positive or negative output of the power supply must not be earth grounded. The DC output of the 24 Vdc power supply must also be isolated from its input. See External 24 Vdc Control Power Supply Characteristics on 11.

• P and H trip units control power connections to F1 (-) and F2 (+).

• See the trip unit manual and the Masterpact NT/NW Universal Power

Circuit Breakers catalog for specific information about the trip unit and other components.

Breaker Communication Module (BCM) • The BCM requires 50 mA at 24 Vdc control power. Control power source

• The BCM control power connections to E1 (+) and E2 (-).

Communication Switches • Report circuit breaker status into BCM. Switches are actuated by the

circuit breaker mechanism to indicate open, closed, tripped, and ready to close status.

• Switches are installed in the circuit breaker mechanism and connected

by wiring and connector into the BCM.

• See BCM instructions for each circuit breaker type for instructions and

mounting information.

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 1—Micrologic Communication System

24 Vdc Control Power • The 24 Vdc (E1, E2) power supply for the BCM must be separate from

the 24 Vdc power supply module for the Micrologic trip units (F1-, F2+).

• The separate power supplies provide isolation between the trip unit and

the communication system. The positive or negative output of the power

supply must not be earth grounded. The DC output of the 24 Vdc power

supply must also be isolated from its input. Specifications are in the table

below:

Table 1: External 24 Vdc Control Power Supply Characteristics

Rated Output Current 1 A

Rated Voltage 24 Vdc

Overall Accuracy ± 5% Vn

Ripple 200 mV peak to peak

Noise 200 mV peak to peak

Voltage Output Variation Limit 21.6 V < V

Capacitive Load 500 µF

Input / Output Capacitive Load 150 pF max

< 26.3 V

out

Daisy Chain 4-Wire Modbus Network • Use 22 AWG Belden

shielded / twisted cable (8723).

• Ground shield at one end of the chain only.

• Respect Standard Wiring Practices as explained on page15.

Cradle Communication Module (CCM) • Used with drawout construction.

• CCM requires 50 mA at 24 Vdc control power. Control power source can

be the same as the one powering the BCM. Control power source must

be isolated and ungrounded. See External 24 Vdc Control Power Supply

Characteristics on 11.

• Provides connections for daisy chain communication wires.

• Provides connections for 24 Vdc control power.

• Can be connected to cradle position switches to report circuit breaker

position (connected, test, disconnected) in the cradle.

• Maintains communication parameters (address, baud rate, parity) for the

cradle so when a spare circuit breaker is racked in, the communication

parameters are automatically transferred.

Communicating Shunt Trip and Shunt Close Coils

• Allows opening and closing the circuit breaker through communication

network.

• Connected to BCM.

• Special three-wire shunt trip and close coils are required.

Ethernet Gateway or Circuit Monitor • Modbus TCP / IP Communication

• System Wide Communication

• Web Pages

• Communication from any Browser

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 1—Micrologic Communication System 06/2012

System Diagrams

Micrologic Trip Unit, BCM and CCM Drawout circuit breakers have four modules:

• BCM (Breaker Communication Module)

• Trip Unit PM (Protection Module)

• Trip Unit MM (Metering Module)

• CCM (Cradle Communication Module)

Figure 1:

Daisy Chain Connected Deviecs

Address

(51)

(1)

(101)

(201)

Circuit Breaker

Cradle

CCM

BCM

Trip Unt

Circuit

Breaker

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units

Communicating System

Connection to the Bus

Connection Between Modules

Fixed Unit

Drawout Unit

Connection to the Bus

Communicating System Using the Modbus Protocol

Plug-In COM Connector

Prefabricated Connector

Wires

To Cradle Module

Connector

Drawout Circuit Breaker Connections

06/2012 Section 1—Micrologic Communication System

BCM to Daisy Chain 1. Trip Unit

2. BCM

3. CCM

4. Communicating Shunt Trip or Shunt Close Coil

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201

Modbus

CCM

Green

White

Red

Black

Com

Secondary Connections

Black

Green

+24VDC

Gnd

Red

White

Modbus

BCM

O / F

SDE

DLO / Tumbler

Gnd

OFO

BreakerCradle

CT +

CT -

CD +

CD -

CE +

CE -

Green

White

Red

Black

Shield

Green

White

Red

Black

Shield

Gnd

+24VDC

Gnd

+24VDC

Gnd

Cradle Position Switches

Daisy Chain

Section 1—Micrologic Communication System 06/2012

BCM and CCM

Modbus TCP / IP Communication

Powerlogic Network Server

SMS

Powerlogic

CM4000 with ECC

EGX Ethernet

Gateway

Ethernet

Circuit Breaker

Browser

RS-485 Mixed Mode

Circuit Monitors or Power Meters

Web

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 1—Micrologic Communication System

Standard Wiring Practices

Communication System • Belden

• 22 AWG shielded, twisted with bare drain wire from shield

• Standard Colors:

— Rx+ = Green

— Rx- = White

— Tx+ = Red

— Tx- = Black

— shield – bare

• Up to 32 devices on a single daisy chain.

• Devices include:

— Circuit Monitors

— Power Meters

—PIF-3’s

—PIF-85’s

— Powerlink™ Panels

— Digital Relays

— Digitrip™ 810D’s

— Micrologic Trip Units

— Model 98 Temperature Controllers

—PLCs

• Requires unique addresses for each device on the daisy chain.

• Daisy chain wiring lengths:

8723

Baud Rate 1–16 Devices 17–32 Devices

1200 10,000 ft. (3,050 m) 10,000 ft. (3,050 m)

2400 10,000 ft. (3,050 m) 5,000 ft. (1,525 m)

4800 10,000 ft. (3,050 m) 5,000 ft. (1,525 m)

9600 10,000 ft. (3,050 m) 4,000 ft. (1,220 m)

19200 10,000 ft. (3,050 m) 2,500 ft. (762.5 m)

• Requires resistor / capacitor terminator at the end of each daisy chain.

Catalog number: 3090MCTAS485

• Belden

cable shield must be connected to ground at only one point. We

recommend that this be done at the master device.

• Maintain color code throughout system.

• Ensure connections are on proper stripped and connection is on wire not

on insulation.

• Do not strip wires more than necessary or they may short together or to

ground and disrupt communication.

• Maintain baud rate and parity throughout the daisy chain.

• Do not use “T” connections except from CCM to BCM, when less than

1 M of cable is needed.

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 1—Micrologic Communication System 06/2012

System Problems Most Modbus system problems are related to wiring and addressing.

Never

• Connect 24 Vdc to communication terminals—it will damage the BCM.

• Allow the shield to touch ground at more than one point—it can cause

communication errors due to circulating currents in shield.

• Change cable type—it can cause communication errors.

• Use Modbus address 16 in a mixed-mode daisy chain (mixed mode

means that there are more than one type of communication on the daisy chain). Address 16 can be used by other components in the system leading to communication errors.

• Use SY / MAX address 01 in a mixed-mode daisy chain. Address 01 can be

used by other components in the system leading to communication errors.

• Mix 2-wire and 4-wire devices on the same daisy chain (2-wire Modbus

is not recommended for Micrologic trip unit communication systems)—it can cause additional load on the communication network and slow down or stop communication.

Troubleshooting General

• Ensure all shipping splits and other connections are made.

• Confirm 24 Vdc control power exists at the CCM and E1 / E2 at proper

polarities.

• Confirm circuit breaker is in Test or Connected positions.

• Confirm trip unit is powered (display should be active).

• Check communication parameters and press “address sync” on CCM.

• Check wiring color codes.

CCM LED Indicators

• No LEDs:

24 Vdc control power present.

• One LED solid Green:

24 Vdc control power; no network traffic.

• One LED solid Red:

CCM is defective.

• One LED solid Green with short voids:

seeing good Modbus packets on the wire.

• One LED solid Green with short Red flashes:

indicates the CCM is seeing Modbus packets with errors,

indicates the CCM is connected to a “mixed-mode” daisy chain.

• Pressing “Address Sync” push-button on CCM:

— three (3) flashes of Red followed by three (3) flashes of Green:

information successfully transferred from BCM to CCM,

— three (3) flashes of Red followed by solid Green:

error transferring information from BCM to CCM.

• Racking circuit breaker into Test position:

— three (3) flashes of Red followed by three (3) flashes of Green:

information successfully transferred from CCM to BCM,

— three (3) flashes of Red followed by solid Green:

error transferring information from CCM to BCM.

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units

Micrologic 3.0 A

long time

alarm

instantaneous

.7.8.9

.95 .98

x In

16 20

(s)

@ 6 Ir

setting

1.5

x In

Max

Ir=

tr=

Isd=

tsd=

Im=

tg=

Digital Display

Change to XX

Press Simultaneously for 3 seconds

Navigation Buttons

(by default)

Ad47

. . .

06/2012 Section 1—Micrologic Communication System

Wiring Checks with Multi-Meter

• Continuity:

— disconnect master device,

— check continuity between each wire,

— twist each pair together and check for continuity,

— ensure no continuity between wires and ground.

• DC Voltage:

— with system fully connected, but NO communication activity,

— measure between Rx+ / Rx- (green / white) on each slave device:

should measure approximately 4 Vdc,

— measure between Tx+ / Tx- (red / black) on each slave device:

should measure approximately 0.8 Vdc.

Addresses, Baud Rate, and Parity Settings

Micrologic communication system uses four addresses: BCM, CCM, trip unit protection module, and trip unit metering module.

Addresses, baud rate, and parity are set through the HMI for the A, P, or H Micrologic trip units. The HMI address setting actually addresses the BCM from 1 to 47 (47 is the default). The other three addresses are set automatically: CCM = BCM + 50 (97 is default), trip unit protection module = BCM + 100 (147 is the default), and trip unit metering module = BCM + 200 (247 is the default).

Micrologic A Trip Unit

Enter configuration mode: Press both buttons and

hold for 3-seconds.

Menus to change: Address

Baud Rate

Parity

Language

To step between parameters: Press and hold the arrow

button. Display will “flash” twice when value is saved.

NOTE: You cannot “go back”.

You will have to start over if you need to make changes.

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 1—Micrologic Communication System 06/2012

Micrologic P and H Trip Unit

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units

ModuleModule

B Communications

Modbus RS 485

06/2012 Section 2—Communication Architecture

Section 2—Communication Architecture

Introduction

Module A module contains:

• a table of registers that may be read-accessed only,

• files such as the event log,

• commands for functions such as writing in the registers, turn the circuit

breaker ON or OFF, reset counters, etc.,

• Modbus functions used to remotely access the registers and the manger

files.

NOTE: The commands for the metering and protection modules are

controlled by the breaker communication module.

Command Interface A command interface in the breaker communication module and cradle

communication module is used to control the applications. This interface monitors execution of the command and issues a report.

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 2—Communication Architecture 06/2012

Modbus Functions The device and cradle Modbus options operate in slave mode and enable a

Modbus master to access all the registers, files and applications contained in the modules.

Breaker Communication Module: @ Address xx

The breaker communication module may be used to remotely monitor circuit breaker status:

• open (OFF),

• closed (ON),

• tripped (SDE),

• ready to close (PF), and so on.

It is also possible to remotely open or close the circuit breaker if the MX and / or XF communicating coils are installed.

Remote control may be disabled by locally setting the Micrologic control unit to manual (“Manu”) mode. “Auto” mode enables remote control of the circuit breaker.

Table 2: Breaker Communication Module Registers

515–543 Modbus Configuration and Identification

544–577 Diagnostics Counters and Modbus Password

603–624 Metering / Protection Module Event Notification

650–670 Tripping Cause and Circuit Breaker Status

671–715 Time-Stamping of Last Status Changes

718–740

800 Communication Profile Activation

12000–12215 Communication Profile

Event Log in the Breaker Communication Module (see “Access to Files” on page 31).

NOTE: More detailed information on these registers is presented in the

Appendix, Table of Registers, “Breaker Communication Module @ Address xx” on page 57.

Communication Profile In order to optimize the number of Modbus request, a communication profile

has been implemented. The communication profile is located in the breaker communication module @address xx. This communication profile contains information coming from the breaker communication module, the metering module and the protection module. The communication profile is defined in the register range: 12000–12215.

Simplified Open/Close Command In order to simplify the application software to remotely open or close the circuit

breaker, a simplified Open/Close command has been implemented. The simplified Open/Close command is located in the breaker communication module @ address xx. With the simplified Open/Close command, it is not necessary to request the flag, neither to enter in configuration mode, neither to read the control word. It is still necessary to be in Auto mode (see register 670). Furthermore, this simplified Open/Close command is password protected (default value = 0000). In order to change the password, it is mandatory to use the « magic box » and the associated Micrologic utility RSU (please consult us).

The simplified Open/Close command is a share command (command code = 57400).

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 2—Communication Architecture

NOTE: More detailed information on this command is presented in the

Appendix, List of Command, “Breaker Communication Module Commands @ Address xx” on page 122.

NOTE: Communication profile and simplified Open/Close command are

available only with a Breaker Communication Module firmware version greater or equal to V2.0 (register 577 must be greater or equal to 02000).

Cradle Communication Module: @ Address xx + 50

The cradle communication module indicates the position of the device on the cradle:

• “connected” position,

• “test” position,

• “disconnected” position.

Table 3: Cradle Communication Module Registers

515–543 Modbus Configuration and Identification

544–577 Diagnostics Counters and Modbus Password

661–664 Cradle Status

679–715 Time-Stamping of Last Status Changes

NOTE: More detailed information on these registers is presented in the

Appendix, Table of Registers, “Cradle Communication Module @ Address xx + 50” on page 62.

Metering Module: @ Address xx + 200 The metering module prepares the electrical values used to manage the

low-voltage distribution system.

Every second, the metering module refreshes the “real-time” RMS measurements. Using this data, it then calculates the demand and energy values, and stores the minimum / maximum values recorded since the last reset.

Metering-module operation depends on the Micrologic settings:

• type of neutral (internal, external, none),

• the normal direction for the flow of active power

(this setting determines the sign of the measured power),

• voltage-transformation ratio,

• rated frequency.

The metering module must be set independently of the protection module to determine:

• the calculation mode for the power (type of distribution system),

• the calculation mode for the power factor (IEEE

, IEEE alt., IEC).

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 2—Communication Architecture 06/2012

Table 4: Metering Module Registers

1000–1299 Real-Time Measurements The metering module refreshes the real-time measurements every second.

1300–1599

1600–1899

2000–2199 Energy Measurements

2200–2299 Demand Values

3000–3299 Time-Stamping

3300–3999 Configuration of the Metering Module

4000–4099 Reserved

4100–5699 Spectral Components

5700–6899 Analog Pre-Defined Alarm (1 to 53)

7100–7499

Description Details

The minimum values for real-time measurements may be accessed at the registers of the real-time values + 300.

All the minimum values are stored in memory and may be reset to zero, group by group according to the list below, by the command interface:

• RMS current,

• current unbalance,

• RMS voltage,

• voltage unbalance,

Minimum Values for the Real-Time Measurements from 1000 to 1299

Maximum Values for the Real-Time Measurements from 1000 to 1299

File Header / Status (See “Access to Files” on page 31)

• frequency,

•power,

• power factor,

• fundamental,

• total harmonic distortion,

• voltage crest factor,

• current crest factor.

NOTE:

The minimum and maximum values of the real-time measurements are stored in the memory. They may be reset to zero. The maximum values of the demand measurements are time stamped and stored in memory. They may be reset to zero.

The maximum values for the real-time measurements may be accessed at the registers of the real-time values + 600.

All the maximum values are stored in memory and may be reset to zero, group by group according to the list below, by the command interface:

• RMS current,

• current unbalance,

• RMS voltage,

• voltage unbalance,

• frequency,

•power,

• power factor,

• fundamental,

• total harmonic distortion,

• voltage crest factor,

• current crest factor.

The energy counters may be:

• reset to zero,

• preloaded with an initial value,

using the reset applications via the command interface.

The demand values are refreshed every 15 seconds for sliding windows or at the end of the time interval for block windows. When block windows are used, an estimation of the value at the end of the time interval is calculated every 15 seconds.

The time-stamping function becomes useful once the time and date have been set on the Micrologic control unit, either locally or via the communication network.

If power to the Micrologic control unit is cut, the time and date must be set again. With firmware release “logic 2002 AA” and above, the clock is powered by the battery. So, it is no more necessary to set time and date after power comes off on the Micrologic control unit.

If power to the communication option is cut, the time and date must be set again. The maximum drift of the Micrologic clock is approximately 0,36 seconds per day. To avoid any significant drift, the clocks must be periodically synchronized via the communication network.

The configuration registers may be read at all times. The registers may be modified via the command interface in configuration mode.

• RMS / phase of voltage harmonic,

• RMS / phase of current harmonic.

The alarms registers may be read at all times. The registers may be modified via the command interface in configuration mode. These alarms (available with Micrologic H only) can be used to trigger wave form capture.

Event log configuration / characteristics and format of records for:

Wave Form Capture (file n° 5)

Event Log of the Metering Module (file n° 10)

Min-Max Event Log (file n° 11)

Maintenance Event Log of the Metering Module (file n° 12)

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 2—Communication Architecture

NOTE: More detailed information on these registers is presented in the

Appendix, Table of Registers, “Metering Module @ Address xx + 200” on page 64.

Protection Module: @ Address xx + 100 The protection module ensures the critical circuit breaker functions. The

Micrologic control unit was designed to make this module completely independent to minimize any issues with the protection functions of the trip units.

It does not use the measurements generated by the metering module, but rather calculates the protection-function inputs and outputs itself. This ensures extremely fast reaction times.

The protection module manages:

• the basic protection: the long-time (LT), short-time (ST), instantaneous

and ground-fault current protection functions,

• the advanced protection: currents I

unbal

, frequency F

max

and F

min

, I

max

, voltages V

unbal

max

, maximum reverse power Rp

, V

max

and

min

, phase

rotation .

The protection module controls:

• the automatic load shedding and reconnection functions, depending on

current and power,

• the optional M2C and M6C contacts.

Remote access to the protection module depends on the parameters set locally on the Micrologic control unit and on the position of the protective cover for the settings.

A local operator may disable all remote access to the protection module. It is also possible to limit access to certain users by setting up a password on the Micrologic control unit.

A protection function intended to trip the circuit breaker cannot be modified if the protective cover is closed, with or without the password.

Table 5: Protection Module Registers

8750–8753 Characteristics of the Protection Module

8754–8803

8833–8842 Measurements Carried Out by the Protection Module

8843–8865 Status of the Protection Module

9000–9599 Time-Stamping and Trip / Alarm History

9600–9628 Micrologic Configuration

9629–9799 Advanced Protection Settings

9800–9899 Relay Configuration (M2C / M6C)

9900–9924

9932–9956

9964–9989

Fine Settings for the Long-Time, Short-Time, Instantaneous, GroundFault and Earth-Leakage Protection Functions

Event Log (See Section: “Access to Files” on page 31)

File N° 20

Maintenance Event Log (See Section: “Access to Files” on page 31)

File N° 12

Fault Wave Form Capture (See Section: “Access to Files” on page 31)

File N° 22

NOTE: More detailed information on these registers is presented in the

Appendix, Table of Registers, “Protection Module @ Address xx + 100” on page 83.

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 3—Command Interface 06/2012

Section 3—Command Interface

Operating Principle Write-access to Micrologic data and control-unit options is monitored to

inhibit accidental operation and operation by unauthorized persons.

Commands sent to Micrologic control units are carried out using a command interface.

The command interface manages transmission and execution of the various commands using the registers numbered from 7700 to 7729 that may be accessed by the Modbus read and write functions.

The breaker communication module supports the command interface for the commands intended for the circuit breaker, measurement, and protection modules.

The cradle communication module supports its own command interface.

Slave @ xx [breaker communication module]

Command Interface 7700 to 7729 Command Interface 7700 to 7729

Commands Intended for the

Breaker Communication Module

Commands Intended for the

Protection Module

Commands Intended for the

Metering Module

Slave @ xx+50 [cradle communication module]

Commands Intended for the

Cradle Communication Module Only

—

The command interface offers two command modes:

• Shared Mode:

This mode may be used to send up to 20 commands in series. It returns exclusively the indications on command transmission via the Modbus protocol. This mode does not return the result of command execution.

• Protected Mode:

This mode may be used to monitor execution of a command and to manage access by a number of supervisors to a single circuit breaker. This is the case for the Modbus multi-master architectures on Ethernet TCP / IP.

When a command is written, the command interface updates its registers

with information on command execution. It is necessary to wait until the command is terminated before sending the next command.

(Recommended time-out is 500 ms.)

Furthermore, when the command is terminated, it is necessary to respect a delay before sending the next command.

(Recommended delay is 20 ms.)

Access control is achieved by a flag reservation and freeing mechanism. In protected mode, a command may be issued only after receiving a flag.

NOTE: Certain commands may be accessed only in protected mode. See

“List of Commands” on page 121 to determine the possible commandmanagement modes.

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 3—Command Interface

Table 6: Command Interface Registers

7700 10 R / W — — INT 0..65535 A P / H

7715 5 R — — INT 0..65535 A P / H

7720 10 R / W — — INT 0..65535 A P / H

7730 100 R — — INT 0..65535 A P / H

See “Micrologic Command Interface for the Modbus Programmer”.

See “List of Commands” on page 121.

Number of Registers

Read /

Scale Unit Format Interval A P / H Description Label

Write

command interface in shared mode— commands

command interface in protected mode— state

command interface in protected mode— commands

command interface in protected mode— return

1, 2

ShCmdIf

PrCmdIfState

PrCmdIf

PrCmdIfBuffer

Send Commands in Shared Mode The shared mode uses the registers numbered 7700 to 7709 in the

command interface:

Table 7: Shared Mode Registers in the Command Interface

Registers Description

7700 Command Number

7701 Parameter P1

7702 Parameter P2

7703 Parameter P3

7704 Parameter P4

7705 Parameter P5

7706 Parameter P6

7707 Parameter P7

7708 Parameter P8

7709 Parameter P9

See the “List of Commands” on page 121 that may be accessed in shared mode and the corresponding parameters in the section with the list of commands for Micrologic control units.

Proceed in the following manner to send a command in shared mode.

1. Parameters

Fill in the command parameters in registers 7701 to 7709.

2. Write Command

Write the command number to register 7700 to initiate execution.

It is possible to optimize data flow on the communication system by using function 16 in the Modbus protocol. In this case, the data may be written to registers 7700 to 7709 in a single step. The circuit breaker communication option will automatically put steps 1 and 2 in the correct order.

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 3—Command Interface 06/2012

Send Commands in Protected Mode

Registers 7715 to 7719:

May be read-accessed only and provide the indications required to use the protected mode.

Command result codes table.

The protected mode uses the registers numbered 7715 to 7829 in the command interface.

Table 8: Protected Mode Registers in the Command Interface

Registers Description

7715 Flag query.

7716 Flag active.

7717 Number of the command being executed.

7718 Number of the last command executed.

7719 Result code of the last command executed.

Register 7715 must be read-accessed to ensure it is 0, if it is not 0 then another user is in configuration mode and you cannot proceed to the next step, see page 128.

The active flag indicates to a supervisor the number of the flag with current access rights to the command interface in protected mode. Only the supervisor that was attributed the given number during a flag query has the right to use the command interface in protected mode. The active flag returns to 0 if no command is sent for two minutes or if the user returns the flag (see the command table for information on return).

he number of the command currently being executed remains set to 0 as long as no command is sent to 7720. As soon as a command is sent, register 7717 indicates the number of the command. It returns to 0 when command execution is terminated.

When command execution is terminated, register 7718 receives the number of the command and register 7719 indicates the result code. The contents of registers 7718 and 7719 are not modified until the next command has been completely executed

Table 9: Command Result Codes

Result Codes Description of Register 7719

0 Command successfully executed.

11 Command not executed, a local user is using the resources.

15 Invalid record size.

16 Illegal file command.

17 Insufficient memory.

42 Invalid file number.

81 Command not defined.

82 Command parameters not set or invalid.

107 Invalid record number.

125 Invalid number of records.

200 Protected mode not active.

201 End of time delay. Command not executed.

202 Invalid password. Command not executed.

Command not executed, the necessary resources are not available or the option is not installed or remote access = NO.

Command not executed, the portable test kit is using the local resources.

Command not executed, the resources are being used by a remote user.

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 3—Command Interface

Registers 7720 to 7729:

May be read-accessed. They are used to send parameters and run execution of commands in protected mode.

Table 10: Read-Accessed Commands

Registers Description

7720 Command Number

7721 Parameter P1

7722 Parameter P2

7723 Parameter P3

7724 Parameter P4

7725 Parameter P5

7726 Parameter P6

7727 Parameter P7

7728 Parameter P8

7729 Parameter P9

See the “List of Commands” on page 121 that may be accessed in protected mode and the corresponding parameters in the section with the list of commands for Micrologic control units.

Command interface registers 7730–7829 may be read accessed. They are used as a buffer for the returned data.

Proceed as follows to send a command in protected mode.

1. Request the Flag

Read register 7715 to ensure it is 0, if it is not 0 then another user is in

configuration mode and you cannot proceed to the next step, see

page 128. It is possible, however, that you already took the flag for

another command and did not return it. For example: if you wished to

sequence sending of a series of commands. It is possible to check if you

have the rights by reading the active flag at register 7716. In this case,

even if you did not read 0 at 7715 when you made the request, it is

possible to send the commands.

2. Fill in Parameters

Fill in the command parameters (P1 to P9) in registers 7721 to 7729.

3. Write Command

Write the command number to register 7720 to initiate execution.

4. Wait for Command Execution

Wait until the command is fully terminated, by reading registers 7717

and 7718 (recommended time-out = 500 ms).

5. Check Result Code

Check the result code for the command by reading register 7719.

6. Send New Command

Send new commands in protected mode by starting with step 2 or go on

to step 7 (recommended delay between command fully terminated and

new command = 20 ms).

7. Release the Flag

Return the flag to free the protected mode. See the command table for

information on returning the flag.

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 3—Command Interface 06/2012

Optimize Sending of Commands It is possible to optimize data flow on the communication system by using

function 16 in the Modbus protocol. In this case, the data may be written to registers 7720 to 7729 in a single step. The command interface will automatically put steps 2 and 3 in the correct order.

NOTE: Do not use function 23 to optimize steps 1, 2 and 3, because this

function does not check access rights to protected mode before sending the command. This may cause problems for another supervisor who currently has the access rights.

Most of the commands that may be used to remotely control the circuit breaker implement two steps, namely the request for the flag (step 1) and return of the flag (step 7).

This mechanism makes it possible for a number of supervisors to issue commands, on the condition that the two steps be implemented.

Using this procedure, you take and return the flag for each of the commands to be issued. In this case, the possible degree of parallelism between the various supervisors is increased, but at the cost of more traffic on the communication system.

If you have a number of commands to send, optimize the mechanism by sending all the commands between the two steps; for example, request the flag, send all the commands in one shot and then return the flag. In this case, you occupy the command interface for a longer time, but traffic on the communication system is optimized.

Remote Configuration

NOTE: Detailed information on the registers is

presented in the Appendix containing the “Table of Registers” on page 55.

A number of simple concepts must be clear in order to remotely configure the circuit breaker successfully.

• Configuration is carried out via the registers:

The configuration for all the modules (circuit breaker, cradle, measurements, and protection functions) may be read-accessed in the table of registers.

The only way to remotely modify a configuration is to modify the contents of the configuration registers.

• The table of registers may be write-accessed in configuration mode only:

To modify the configuration registers, it is necessary to remove the register write-protect function by running the command required to enter configuration mode, via the command interface. Once in configuration mode, it is possible to write access the configuration registers and you may modify one or more registers using the standard Modbus write functions.

Breaker Communication Module Slave @ xx

Regular Range Configuration Registers

534–543

Identification of the Breaker Communication Module

Cradle Communication Module Slave @ xx + 50

Regular Range Configuration Registers

534–543

Identification of the Cradle Communication Module

0613IB1201 Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 06/2012 Section 3—Command Interface

Metering Module Slave @ xx + 200

Regular Range Configuration Registers

3303–3355 Configuration of the Metering Module

6000–6011 Configuration of Analog Pre-Defined Alarm 1

6012–6635 Configuration of Analog Pre-Defined Alarm 2 to 53

Protection Module Slave @ xx + 100

Regular Range Configuration Registers

8753–8803 Fine Adjustments for the Basic Protection

9604–9618 Configuration of the Protection Module

Continued on next page

9629–9798 Settings for the Advanced Protections

9800–9846 Configuration of the Output Relays (M2C / M6C)

xx = breaker communication module address.

Specific conditions must be met to enter the configuration mode.

Remote access is not possible if local configuration is underway and visa-versa.

When a user is in the process of locally modifying the configuration of Micrologic or of its options, it is not possible to start a remote-configuration sequence.

Micrologic considers that a local user is in the process of modifying the configuration when a parameter field is highlighted or as soon as the Micrologic plastic cover is opened.

Access to configuration mode is subject to different restrictions depending on the module.

Access to configuration mode for the protection module requires the remote-access code that was programmed on the front panel of the Micrologic control unit.

This code may be obtained only via the setting screen on the Micrologic control unit itself. It is only possible to access the configuration mode for the protection module if the Micrologic control unit has been set to authorize remote access. This setting must be made manually via the front panel of the Micrologic control unit. It is possible to consult the protection module register 9800 to check the status of this parameter.

Access to configuration mode for the breaker communication, cradle communication and metering modules requires a check word that must first be read in the table of registers. This two-step operation is intended to avoid inadvertent access to the configuration mode.

The access commands for configuration mode implement the protected mode and systematically inform on the command result.

New configurations are always checked before being accepted.

When writing in the configuration registers, the Modbus write functions are accepted, even if the written value exceeds the limits presented in the tables of registers that should be consulted first.

To assist in configuring the protection functions, Micrologic provides access to a set of registers that list the minimum and maximum permissible values for the various protection settings.

Modbus™ Communications System for Micrologic™ A, P, and H Trip Units 0613IB1201 Section 3—Command Interface 06/2012

All the configuration data entered are checked before they enter into effect. This check is run when you exit configuration mode, using the commands Out_pCfg, Out_mCfg or Out_CommCfg.

If one of the configuration settings is incorrect, all the new configuration data are rejected. The system indicates why the data are rejected via the result returned for the command used to exit the configuration mode. The protection module indicates the first ten faulty configuration registers. See the information on command Out_pCfg for further details.

The new configuration data take effect only on exiting configuration mode.

The new configuration data take effect only on exiting configuration mode so that the data can be checked; for example, it is when the Out_pCfg, Out_mCfg or Out_CommCfg command has been successfully run that the new configuration settings become active.

Example of a Remote Parameter-Setting Sequence

Below are the steps that must be followed to modify the long-time (LT) current setting.

1. Check that remote access is authorized by reading register 9800 at address @+100 [protection module].

2. Make sure you have the remote-access code, noted on the “Local / Remote” screen in the “COM setup” menu of Micrologic.

3. Enter configuration mode for the protection module, using the In_pCfg command. See the Appendix, “Examples of Commands” on page 127.

4. Enter the new setting in registers 8753 to 8803, at the address @+100 [protection module]. Make sure these new settings are below the value set by the rotary switch.

5. Exit configuration mode for the protection module, using the Out_pCfg command, and check first for an error code returned by the command interface, then the parameters returned by Out_pCfg in registers 7730 to 7739 of the circuit breaker command interface.

6. Read the contents of the registers 8756 and 8757. The settings should be those entered, if step 5 did not return an error.

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