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Wednesday, April 26, 2017
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Modbus Serial Diagnostic Register Description
I'm trying to determine the intended function of the "Diagnostic Register"

I'm developing several Modbus (RTU) server devices and, as is quite often the case, found some very vague information in the specifications. One of the sub-functions under Diagnostics (0x08) is "Clear Counters and Diagnostic Register" (0x000A). I can find no other reference anywhere that even attempts to describe what might be in this register that I'm supposed to clear.

I'm hoping that there might be a guru lurking around here who could shed some light on this subject. Google produced very disappointing results.