SINGLE_WRITE: Write a Single Register to a Modbus Device

EcoStruxure Machine Expert version 1.1 does not support the M258, LMC058 and LMC078 controllers.

Function Description

The SINGLE_WRITE function block writes a single internal register to an external Modbus device.

Graphical Representation

SINGLE_WRITE - Specific Parameter Description

Input	Type	Comment
ObjType	ObjectType	ObjType describes the type of object(s) to write (MW only).
FirstObject	DINT	FirstObject is the index of the object to write.
theWord	WORD	This input contains the value to write.

The input and output parameters that are common to all PLCCommunication library function blocks are described elsewhere.

Example

This example shows the implementation of the SINGLE_WRITE function block in conjunction with the ADDM function block in order to write a single register at address 11 of a Modbus slave. The Modbus slave is specified with address 8 and must be reachable through the serial line interface 1. Precondition is the configuration of the Modbus Manager as master under the serial line interface 1.