Mitsubishi Electric MELSEC Q Series Programming Manual page 122

4 DEDICATED DEVICES
(5) Safety signal comparison status 2
Signal name
Safety signal comparison status 2
(Note-1): is Multiple CPU shared device start address of safety signal comparison parameter.
[Function]
The safety signal comparison status is stored.
[Operation]
Each bit corresponds to the following signals.
F E D C B A 9
• Bit 0: Output off check error
This signal is turned ON when an error is detected in output signal
by output off check.
This is the inverted signal of bit F of "safety signal comparison
status"
• Bit 1: Device memory check error (backup)
This signal is turned ON when the CPU detects device memory
check error.
This is the same signal as bit 7 of "safety signal comparison status".
• Bit E: Safety communication function enable (Only Motion CPU)
This signal is turned ON when the safety communication parameter
is set.
• Bit F: Speed monitoring function enable (Only Motion CPU)
This signal is turned ON when the speed monitoring parameter is
set.
(6) Safety signal comparison activity check information
Signal name
Safety signal comparison activity check
information
(Note-1): is Multiple CPU shared device start address of safety signal comparison parameter.
[Function]
The counter value of safety signal comparison activity check is stored.
[Operation]
To confirm that the safety signal comparison is properly executed by the
Motion CPU and PLC CPU, the CPUs perform activity check each other.
PLC CPU side
U3E0\G +29
8 7 6 5 4 3 2
1 0
bit
Output off check error
Device memory check error (backup)
Safety communication function enable (Only Motion CPU)
Speed monitoring function enable (Only Motion CPU)
PLC CPU side
U3E0\G +30
4 - 9
(Note-1)
Device No.
Motion CPU side
U3E1\G +29
(Note-1)
Device No.
Motion CPU side
U3E1\G +30