Mitsubishi Electric MELSEC QS Series User Manual page 79

5
DATA LINK PROCESSING TIME AND STATION
STATUS AT ERROR OCCURRENCE
Remote
Data link status
input
(RX)
The send/receive area of the safety remote I/O
station with the communication error
Auto-
refreshes
the clear
data
All points
OFF
When a communication
The send/receive area of a normal safety or
error occurs in a safety
standard remote I/O station
remote I/O station
(Clears inputs from data link Continue
faulty stations)
Depends
on the
input
The send/receive area of a normal remote device
station
Continue
Depends
on the
input
The send/receive area of the standard remote I/O
station with the communication error
Auto-
refreshes
the clear
data
All points
OFF
When a communication
The send/receive area of a normal safety or
error occurs in a standard
standard remote I/O station
remote I/O station
(Clears inputs from data link Continue
faulty stations)
Depends
on the
input
The send/receive area of a normal remote device
station
Continue
Depends
on the
input
Table5.1 Station status at error occurrence (2/3)
Safety master station
Remote Remote Remote
register output register
(RWr) (RY) (RWw)
– Stop –
– Hold –
– Continue –
– Update –
Continue Continue Continue
Depends
on the Update Update
input
– Continue –
– Update –
– Continue –
– Update –
Continue Continue Continue
Depends
on the Update Update
input
* 1: Some types of remote I/O stations allow the selection of the output mode (hold/clear) for the case
of a communication error. Their operation differs depending on the setting.
5.4 Station Status at Error Occurrence
Remote I/O station
Remote
Input Output input
(RX)
Station with the
communication error
(safety station)
Depends
on All points
external OFF
signals
Normal station
Continue
Continue Continue
Station with the
communication error
(standard station)
Depends
on All points
external OFF *1
signals
Normal station
Continue
Continue Continue
Remote device station,
Remote Remote Remote
register output register
(RWr) (RY) (RWw)
Continue Continue Continue
Continue Continue Continue
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