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I/O bus error


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Hello everyone 

I started to work with unitronics all in one (plc+hmi)

My hmi is usp-156-x10

I'm installed io card and configured modules.  I get this error when I download the programs:

I/O bus error [code 1]

App i/o is ok. But identified i/o is" ????"

My modules card is : uid-o8o8r & uia-0402n

What should I do?


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