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help to setup a modbus Geobrick


eobe
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Hello, I need help to setup a modbus Geobrick.

The Geobrick (master) communicates with a safety PLC (slave)

 

The Modbus protocol says to communicate, you must configure (on the master ) the IP address, the slave number and the register number + function code (3 for Read Holding Registers or 16 for Write Multiple Registers)

 

At PEWIN32, I do not see how to configure the slave number and register number. Can someone explain me?

I see, you need to configure the "Modbus reference #", but what data should I put (N° slave + starting adresss?? Unit identifier ?)?

 

1090646167_image1.JPG.ee15cf6d1e6c6b5a33751fde2becc625.JPG

When I use a program like "Modbus Doctor", I can read the desired value (see screenshot below).

 

1081213683_image2.JPG.9316197e505bedc56b901dd4007752c8.JPG

 

thank you in advance for your help

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