Power Electronics VS65 Series Programming And Software Manual

POWER ELECTRONICS
VS65 SERIES MV SOFT STARTER
MODBUS COMMUNICATION
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5.3.2. Modbus Function Code nº 16.Writing Registers.
This function codes allows the Modbus controller (master) to write the data registers content given
by the soft starter (slave); excepting “Only Read” registers. Notice that the register writing carried
out by the master does not stop further modifications done by the slave.
The soft starter function code implementation enables the writing of up to 5 registers within the
same frame.
The following example shows how to write the equipment current. The list below shows
information which must be included:
 Slave data access.
 Modbus function code (16 writing registers).
 Starting data address.
 Nº of registers to write.
 Nº of bytes to write
 Register content to write
 CRC- 16 code.
 Slave response contents:
 Slave data address.
 Modbus function code (16 writing registers).
 Starting data address.
 Nº of written registers.
 CRC-16 code.
Working Example function code nº 16 (Register writing).
Whenever the user wishes to write the equipment current (nameplate) through communications,
value found in [G2] parameter group assigning a value of 100A. The frame to transmit should be:
Modbus Slave
Address
Modbus
function
code
Initial Data
Address
(40022)
Number of
Registers
Number of
Bytes
Value
(= 100)
CRC-16
0AH
10H
00H 15H
00H 01H
02H
00H 64H
D6H 4EH
The slave response will be:
Modbus Slave
Address
Modbus
function code
Initial Data
Address
(40022)
Number of
Registers
CRC-16
0AH
10H
00H 15H
00H 01H
11H 76H

Power Electronics VS65 Series Specifications

General

Brand	Power Electronics
Model	VS65 Series
Category	Controller
Language	English