Signal monitoring apparatus, signal transmitting/receiving apparatus, and communication apparatus

摘要

A signal monitoring device, a signal transmission/reception device and a communication device, which realize easy acquisition of a diagnosis result and a signal value, and further realize fast acquisition of the diagnosis result. A signal monitoring device includes: a difference value calculator that time-sequentially calculates, for a signal to be monitored, a difference value between a signal value thereof and a previously set threshold; and a storage that updates and stores the time-sequentially calculated difference value in accordance with a previously set rule.

主权项

1. A signal monitoring device including a storage, the signal monitoring device transmits information regarding a difference value to a host-side device, the signal monitoring device comprising:
a difference value calculator that:
time-sequentially calculates, for a signal to be monitored, a difference value between a signal value thereof and a previously set threshold;compares the time-sequentially calculated difference value with a previously store difference value in the storage; anddetermines whether the time-sequentially calculated difference value is less than or greater than the previously stored difference value; and the storage that updates and stores the time-sequentially calculated difference value based on a result of the determination.