Mitsubishi Electric MELSEC Q Series Programming Manual page 123

4 DEDICATED DEVICES
(7) Safety signal comparison status
Signal name
Safety signal comparison status
(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.
E
F D C B A
• Bit 0: Safety signal comparison normal
This signal is turned ON when no error relating to signal comparison
and sequence check is occurring, and the safety signal comparison
is properly being performed on Motion CPU or PLC CPU side
• Bit 1: Safety signal input comparison error
This signal is turned ON when mismatch status is detected by input
signal comparison on Motion CPU or PLC CPU side.
• Bit 2: Counterpart's signal comparison stop detected
This signal is turned ON when Motion CPU or PLC CPU side detect
that the safety signal comparison process (sequence program) on
counterpart's CPU is not executed correctly.
• Bit 3: Safety signal data error detected (only Motion CPU side)
This signal is turned ON when data transmission from the Motion
CPU to PLC CPU is not executed correctly. (The data is to be
transferred from the Motion CPU to PLC CPU so that the PLC CPU
executes the safety signal comparison sequence program.)
• Bit 4: Safety signal output FB comparison error
This signal is turned ON when the output signal and its return input
signal do not match on Motion CPU or PLC CPU side.
• Bit 5: Comparison process start
This signal is turned ON when the safety signal comparison
processing (sequence program) is being executed on Motion CPU
or PLC CPU side.
PLC CPU side
U3E0\G +31
7 6 4
9 8 5 3 2 1 0
bit
4 - 10
(Note-1)
Device No.
Motion CPU side
Safety signal comparison normal
Safety signal input comparison error
Counterpart's signal comparison stop detected
Safety signal data error detected
Safety signal output FB comparison error
Comparison process start
Initial signal comparison check complete
Device memory check error
Motion CPU side comparison process running
PLC CPU side comparison process running
Safety signal comparison circuit check normal
Remote IO transmission disconnected
Output off check request
Output off check normal
(Note-1): Only Motion CPU side
U3E1\G +31
(Note-1)
(Note-1)
(Note-1)
(Note-1)
(Note-1)