Modbus slave ID

[tucano]

Hello, seems I can't use this library for a real connection with an industrial machine.

The machine have modbus slave ID = 1. Where I can set the slave ID? All the request goes to timeout.

I am playing with Example_01 (read holding reg, FC03)

Best Regards

[stefanpoeter]

I think a request with a wrong id (event thou we do not need the id for modbus tcp) are usually not going to timeout. Give me some more informations like server and client IP. What kind of a plc are you using. Can you ping your PLC? try to connect to the plc with the node-modbus library.

[tucano]

Hi, have hard coded the Slave ID of my machine and it works...

commit:
https://github.com/tucano/chrome-modbus/commit/84950138e41ba32537e2326e830240f20a2dce79#commitcomment-17856036

You have putted

.setUID(255);

I have

.setUID(1);

If we make a function arguments, everybody will be happy.

On Tue, 7 Jun 2016 at 17:38 Stefan Poeter [email protected] wrote:

I think a request with a wrong id (event thou we do not need the id for
modbus tcp) are usually not going to timeout. Give me some more
informations like server and client IP. What kind of a plc are you using.
Can you ping your PLC? try to connect to the plc with the node-modbus
https://github.com/Cloud-Automation/node-modbus library.

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[stefanpoeter]

I will see to it. Great work. Thanks.