Hi.

I have been working on my brewery system for a while now. Yesterday my systen would not run and I don't know what I have changed. I get three errors when booting:

Failed to set priority, plc thread 100 ms, prio 22
IO init Card '...-USB-Mega'. number already configured
Failed to initialize io, %IO-E-INITFAIL, Initialization failed

What could be the problems here?


I have another quiestion also. What would be the benefit of configuring the Arduino Mega as a modbus server compared to using USB?

Regards,
Trygve

Hi Trygve,

'number already configured' means that two channel objects have the same Number.

/Claes

Thanks.

That was obvious. Should have managed to think that out my self.
And now it runs without errors.

Regards,
Trygve

I've been seeing a lot of reference to Arduino and Raspberry PI systems on this forum. This is just my opinion, but I think these system are better used as learning devised rather than production IO devices. There are low cost industrial PLCs with all of the R&D already completed in hardened IO cases for very little money. Check out the Koyo Click and Modicon M241/M251 lines. The Click PLC with MODBUS ethernet is $190US. It comes with four relay outputs, four digital inputs, four analog inputs and 2 analog outputs. It also has the ability to add expansion IO cards and has free Windows programming software. You cannot beat this PLC for its cost for value.