Prosoft-technology MVI56E-MCMR Bedienungsanleitung PDF herunterladen (Seite 72)

Configuring the MVI56E-MCMR Module MVI56E-MCMR ♦ ControlLogix Platform

User Manual Modbus Communication Module with Reduced Data Block

Page 72 of 225 ProSoft Technology, Inc.

May 13, 2014

Preset (Write) Single Register 4x (Modbus Function Code 6)

Used to write to Modbus Holding Registers 4x, this function code will write a

single register to the slave device. The Enable code can be set to a value of 1 for

a continuous write, or a value of 2 to write the data to the slave device only when

the data associated with the Internal Address field has changed.

The following illustration shows a sample command to write Modbus addresses

41041 of Modbus Slave Device Address 1.

Parameter

Description

Enable = 1

The module will send the command every time it goes through the

command list.

Internal Address = 5

Writes the data from address 5 of the module memory to the slave

device. Based on the BACKPLANE CONFIGURATION, this will take the

data from MCMR.DATA.WRITEDATA[5] and write that information out

to the slave device.

Reg Count = 1

Writes 1 register (16-bit) to the slave device.

Node Address = 1

Issues the Modbus command to Modbus Slave Device Address 1.

Modbus Function =2

Issues Modbus Function Code 6 to write a single register.

MB Address in Device =

1040

Function Code 6, MB Address in Device of 1040 will write to address

41041 of the Modbus slave device.

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Prosoft-technology MVI56E-MCMR Bedienungsanleitung Seite 72