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Messages - Ghanos

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Modbus / Re: Modbus Problem...
« on: August 27, 2017, 02:11:26 PM »
Dear Sirs,
I just started to retrofit a Cnc machine Biesse Rover 346.

I am planning to control all the digital I/O with ModBus tcp/up because I don't want to replace the original I/O modules.

Really, I don't know what is the communication protocol are the modules connected!!

As I see comm. wires has 3 wires look like A B and ground.
It sounds like RS485 could be???
Could 3 wires connection be not a RS 485 protocol?
 The module is SIR88 from CNI italy!!

So, please let me know what is the needed hardware and software and cables to do the job??
Please let me know some company names and give some examples for how to read and drive inputs and outputs by vb macros!!

Really thanks in advanced!!
Regards





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