Modbus over Ethernet/TCP

[ottelo]

Hi there. Thanks for the useful client/master software. Does anybody have a working example for a server/slave project?

[holly7787]

i have used this as Server http://www.plcsimulator.org/Home

[ottelo]

Thanks but I need a sample project for CVI to implent it into my applications.

[aaron029]

Un grand merci - Many Thanks - Toda Raba

[xjDu]

Why can't my modbus communication be realized?When connecting, it appears that the server has closed the connection

[holly7787]

can you give more information? are you trying to connect to a device or to a simulator?

[xjDu]

I'm trying to connect to a device,which have two slave.(slave ID 5 and 10)But when I looked at the source file client.c, I didn't find the Settings for the slave ID. Can you help me?

Thanks.

[holly7787]

try to change in the rlmodbusclient.c file the unit identifier from 255 to 5 or 10

[xjDu]

Do you mean to change the define unit value in the picture I uploaded?I've tried, but I still haven't succeeded. Thanks。

[holly7787]

no, this is the octect dimension. you have to change at line 82

	// Unit identifer (TCP/IP = 255)
	buffer[6] = 255;