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.