ABB MRP31.0 Manuale utente

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MANUAL

MRP31.0 Modbus RTU

communication module

Universal Motor Controller UMC100.3

2UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

Description

The MRP31.0 device allows the connection of the Universal Motor Controller UMC100.3 to a Modbus RTU network.

Target group

This manual is intended for the use of specialists in electrical installation and control and automation engineering, who are

familiar with the applicable national standards.

Safety requirements

The responsible staff must ensure that the application or use of the products described satisfy all the requirements for

safety, including all the relevant laws, regulations, guidelines and standards.

Using this manual

Symbols

This manual contains symbols to point the reader to important information, potential risks and precautionary

information. The following symbols are used:

Sign to indicate a potentially dangerous situation that can cause damage to the

connected devices or the environment.

Sign to indicate important information and conditions.

Sign to indicate a potentially dangerous situation that can cause human injuries.

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Terms and abbreviations

 



 Universal Motor Controller

RTU 

transmission mode

LED (Light Emitting Diodes)

 Modbus TCP communication interface

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Related documents

Technical documentation Document no.

 



 

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Document history

  Initial release

  Revision A

 New template

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Important notice

4 Overview

5 Installation

11 Diagnosis

15 Technical data

16 Dimensional drawings

17 Ordering data

3UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

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Table of contents

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Overview



RS485 Standard















(data low).

Ground wire and cable shield should be connected to prevent common mode voltage between the network devices from



prevent signal reflection.

The MRP31.0 Modbus Interface

The MRP31.0 Modbus communication interface is an optional device for the UMC100.3 which enables the connection of the



• 

Parity and frame length are automatically detected

• MRP31.0 supports the RTU transmission mode only

• 

time.

Through the interface you can:

• 

• Read status information and actual process values from the UMC100.3

• Read device diagnosis information

MRP31

X3:

Modbus

connection

Status Indication

LEDs

X3: Modbus connection

X1: Communication

to UMC100.3



supply connection

Top View Side View

4UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

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Installation

Mechanical installation

The Modbus interface module MRP31.0 can be mounted either on the UMC100.3 itself or separately from the UMC100.3 using

the single mounting kit (SMK3.0).

Mounting the MRP31.0 on the UMC100.3

When the module is installed directly on the UMC100.3 the UMC100.3 with MRP31.0 acts like a device with integrated

Modbus RTU communication. No additional accessories are needed.

Power

MRP31 Move down MRP31 until



on UMC100.3

Mounting the MRP31.0 remote from the UMC100.3









—

01 Image shows UMC100.3 DC.

5UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

Mounting and dismounting



Mounting Dismounting

—



Mounting the MRP31.0 on the single mounting kit

Step 1:

Plug in the communication and

power supply connectors.

Step 3:

Move down the MRP31.0 until

snapped in

Step 2:

Move down the MRP31.0

Snap-in

Snapped

Move down

Step 4:



6UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

MRP31

Demounting the MRP31.0





screw driver and move the

MRP31.0 upwards to loosen



7UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

Electrical installation

Modbus Connection

Connect Modbus to X3.

General

Arrange the communication cables as far away from the motor cables as possible. Avoid parallel runs. Use bushings at cable

entries.

—

Connector X3

PIN Description

 



GND. Isolated signal ground

Data A (inverting)

 

Bus termination



equipped with internal bus termination



devices located at bus ends.

Communication settings



communication / Modbus RTU) and are copied then automatically to the MRP31.0. After changing communication settings

perform a power cycle.

Master supervision



busfault reaction.

Modbus bus timeout

 

Default 0 ms (deactivated)



Supported baudrates



Modbus data frame

•  

•  

•  

•  

Slave address

 



bus address.



8UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

Number of nodes in a Modbus network



Network length



bus stub lines should be avoided. To bridge long distances between the Modbus master and the slaves (e.g. between the

control room and the motor control center) it is recommended to use fiber optic converters.

Modbus TCP



Modbus line with MRP31.0 directly connected to UMC100.3 in a drawout system

The following figure shows a simplified diagram on how to connect the UMC100.3 to a Modbus network. Required grounding

of the Modbus cable is not shown in this figure.

Ground wire and cable shield should be connected to prevent common mode voltage between the network

devices from drifting outside the allowable limits.

UMC100.3 and MRP31.0

mounted in drawer

Termination active



Network

Length

Modbus Cable

9UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

Modbus line with MRP31.0 mounted outside a drawer using single mounting kit (SMK3.0)

The following figure shows a simplified diagram on how to connect the UMC100.3 to a Modbus network if the UMC100.3 is

inside a drawer and the Modbus communication interface is mounted outside the drawer e.g. in the cable compartment. In

drawout systems this solution has several benefits:

• Modbus address is stored in the Modbus communication interface in addition to the UMC100.3. In case of a drawer re



• Swapping of drawers detected if "Address Check" in UMC100.3 enabled. I.e. it is not possible to accidentally start the

wrong motor because of swapped drawer.

Required grounding of the Modbus cable is not shown in this figure.

LT55

(2b)

(1)

(3)

(4)

max. 3m

(2a)



Network

Length

Termination active

(1) 24V DC supply for the

MRP31.0 communication

interface. This lets the

MRP31.0 stay active even

in case the drawer is

withdrawn.

(2a) Ready made

connection cable from

SMK3.0 X1 to backside of

drawer.

(2b) Ready made

connection cable from

inside drawer to

UMC100.3 X1

(3) UMC100.3

mounted inside a drawer

(4) Modbus

communication adapter

with single mounting kit

(SMK3.0).

Termination active

Modbus Cable

10 UNIVERSAL MOTOR CONTROLLER UMC100.3 | MRP31.0 MODBUS TCP COMMUNICATION MODULE MANUAL

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