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CHAPTER 8 FUNCTIONS
8
8.2 Cyclic Transmission
8.2.5 Input status setting in case of failure
8.2.5 Input status setting in case of failure
For the master/local module, whether to hold or clear input data from a data link faulty station can be set.
.
Input data of safety communication from the data link faulty station is cleared regardless of the input status setting of the
data link faulty station and the safety CPU operation mode.
Status Range where the settings are enabled
Input status of data link faulty station
Clearing or holding the following RX and RY input data can be selected.
• Master station RX
• Local station RX and RY (only the input data from other stations)
Even if “Clear” is set, input data will be held for two seconds after disconnection.
The RWr and RWw input data are held regardless of any setting.
• Master station RWr
• Local station RWr and RWw (only the input data from other stations)
Master station
(safety station)
RX
RY
Station No. 0
Area for which "Clear" or "Hold" can be selected in the data link faulty station
input status setting
Area where data are cleared when a stop error occurs in the safety CPU module
Area where data are held regardless of the setting
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 1
RWw
RWr
Local
station
RY
RX
Station No. 1
RWr
RWw
Local
station
RY
RX
Station No. 2
RWr
RWw
Station
No. 2
Station
No. 1
Station
No. 1
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 1