Introduction

An M580 system can detect the existence of communication loss in the following ways:

• a cable that is broken or detached, which is detected by both a CPU with Ethernet I/O scanner service and a BM•CRA312•0 X80 EIO adapter module

• a BM•CRA312•0 module that has stopped communicating, which is detected by a CPU with Ethernet I/O scanner service

• a CPU with Ethernet I/O scanner service that has stopped communicating, which is detected by a BM•CRA312•0 module

The time required by the system to detect each type of communication loss is described on the following pages.