Modbus Registers; Important Information; Command And Configuration Registers (Read/Write); Parameter Management - Danfoss VLT Soft Starter MCD 600 Installation Manual

Modbus TCP Card
Installation Guide

7 Modbus Registers

7.1 Important Information

The available features and parameter details may vary according to the model and software version of the soft starter. Refer to
the VLT® Soft Starter MCD 600 Operating Guide for details of parameters and supported features.
All references to registers mean the registers within the communication card unless otherwise stated.

7.2 Command and Configuration Registers (Read/Write)

Table 3: Details of Command and Configuration Registers
Register Description
40001 Command (single write)
40002 Reserved
40003 Reserved
40004 Reserved
40005 Reserved
40006 Reserved
40007 Reserved
40008 Reserved
40009–40xxx Parameter management (single/multi-
ple read or multiple write)

7.3 Parameter Management

Parameters can be read from and written to the soft starter. When writing parameters to the soft starter, every parameter is updated
to match the values in the PLC.
While parameters are being written, the soft starter cannot start/stop the motor.
The Modbus TCP protocol limits read/write operations to a maximum of 123 registers at one time. The registers must be consecu-
tive.
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Bits Details
0–7
To send a command to the soft starter, write the required value:
00000000 = Stop
00000001 = Start
00000010 = Reset
00000100 = Quick stop (coast to stop)
00001000 = Forced communication trip
00010000 = Start using Parameter Set 1
00100000 = Start using Parameter Set 2
01000000 = Reserved
10000000 = Reserved
8–14 Reserved
15 Must = 1
0–15 Manage soft starter programmable parameters.
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Modbus Registers
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