Ras Function; Automatic Return Function; Slave Station Cutoff Function - Mitsubishi FX2N-16CCL-M User Manual

FX2N-16CCL-M CC-Link System Master Block
5.11

RAS Function

The term "RAS" stands for "reliability, availability and serviceability", and refers to the total
operability of an automated facility.
5.11.1

Automatic return function

This function allows a module which was disconnected from the data link by power OFF, etc. to
automatically join the data link again when it recovers the normal status.
Set the automatic return function using the mode setting switch.
Table 5.2:
Mode setting switch
0
1
2
5.11.2

Slave station cutoff function

This function cuts off only remote stations in which data link is disabled by power OFF, etc.,
and continues the data link using only normal remote stations.
When a cable is broken, the data link is disabled in the entire system because
terminal resistors do not function any more.
Terminal resistor
Setting description
Online (automatic return allowed)
Unusable
Offline
Master
station
Remote I/O
station
Terminal resistor
Continues data link excluding the down station.
Point
Master
station
Remote I/O
station
Data link disabled (disconnected status)
Remote
device
Down
station
Remote I/O
station
Remote
device
Down
station
Remote I/O
station
Wire breakage
Functions 5
Remarks
⎯
⎯
Remote
device
station
Terminal resistor
Remote
device
station
Terminal resistor
5-20