Station Status At Error Occurrence - Mitsubishi Electric MELSEC QS Series User Manual

5
DATA LINK PROCESSING TIME AND STATION
STATUS AT ERROR OCCURRENCE

5.4 Station Status at Error Occurrence

Table5.1 lists station status at error occurrence in classification by station type.
In Table5.1, the data in the "Safety master station" column represent the following:
Remote
Data link status
input
(RX)
The send/receive area of a safety remote I/O station
Stop
Hold
The send/receive area of a standard remote I/O station
When the safety CPU
Stop
module on the safety
master station is
Hold
stopped due to an error
(Data link stop)
The send/receive area of a remote device station
Stop
Hold
The send/receive area of a safety remote I/O station
Auto-
refreshes
the clear
data
All points
OFF
The send/receive area of a standard remote I/O station
Auto-
refreshes
When data link for the
the clear
entire system is
data
stopped
All points
(Clears inputs from data
OFF
link faulty stations)
The send/receive area of a remote device station
Auto-
refreshes
the clear
data
All points
OFF
5
- 21 5.4 Station Status at Error Occurrence
Remote input (RX) Remote register (RWr)
Automatic refresh operation of safety CPU module
Status of refresh target CPU device
Table5.1 Station status at error occurrence (1/3)
Safety master station
Remote Remote
register output
(RWr) (RY)
– Stop
*2
–
Hold
– Stop
–
Hold
Stop Stop
Hold Hold
– Stop
– Hold
– Continue
– Update
Stop Continue Continue
Hold Update Update
* 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.
* 2: When the safety CPU module stops due to error detection, the automatic refresh processing is
stopped. Because of this, the remote output (RY) in the buffer memory is held regardless of
whether the slave station forced clear function at safety CPU STOP is enabled or not.
Remote output (RY)
Automatic refresh operation of safety CPU module
Status of refresh target buffer memory
Remote I/O station
Remote
register Input Output
(RWw)
–
Safety remote I/O station
–
Depends on
–
All points
external
OFF
–
signals
Standard remote I/O
station
Depends on
Stop
All points
external
*1
OFF
Hold
signals
Safety remote I/O station
–
–
Depends on
All points
external
OFF
signals
–
–
Standard remote I/O
station
Depends on
All points
external
OFF
signals
Remote register (RWw)
Remote device station,
Remote Remote
Remote
register output
input (RX)
(RWr)
Depends Depends
Depends
on the on the
on the
spec. of spec. of
spec. of
the the
the remote
remote remote
station
station station
Depends Depends
Depends
on the on the
on the
spec. of spec. of
spec. of
the the
the remote
remote remote
station
station station
*1
Remote
register
(RY) (RWw)
Depends
on the
spec. of
the
remote
station
Depends
on the
spec. of
the
remote
station