Modbus Handler Service+ EIServiceSDK

Overview

SNTest.exe is a demo program to show how to use EIService SDK API to do a Modbus data read action from Modbus register or data write action to the register.

Modbus Simulator

Start ModSim32 and configure the register for the demonstration:

Set Holding Register data address: 0001 (From first Holding Register address)

Set Length: 8

Set data from address 40001 ~ 40008, for example 101, 102 , 103 …

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WISE Agent and Modbus Plugin

Configure Modbus Plugin settings (Modbus_Handler.ini) as showed below for the demonstrations:

[Platform]

Name=WISE-4012E

Protocol=Modbus_TCP

ClientIP=127.0.0.1

ClientPort=502

UnitID=1

Interval=1

#Interval: The time delay between two modbus access round in second.

Delay=0

#Delay: The time delay between two modbus access in millisecond.

#Delay=0 means no delay.

Log=0

[Holding Registers]

numberOfR=3

R0=0,Data0,-1000000,1000000,1,V,0,""

R1=1,Data1,-1000000,1000000,1,V,0,""

R2=2,Data2,-1000000,1000000,1,V,0,""

;tag = offset, name, min, max, precision, unit, data type, lua script

Demo Program

Run SNTest.exe and select item 5) Set Service’s Action.

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2. To do a data Write Demonstration, please set the Service Name, Plugin Name, Sensor Name, Data Type and the value of Data that you want to write, for example

Service Name: Modbus_Handler

Plugin Name: Modbus_Handler

Sensor Name: Modbus_Handler/Holding Registers/Data0

Data Type: v

Data: 66

After completed the procedure, the numbers will be written into assigned variable by EIService SDK function.

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3. You can check ModSim32 screen to confirm the procedure of data write.

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(End)