Mitsubishi Electric MELSEC iQ-R Series Safety Function Block Reference page 105

FB details
o_bS_EquivalentOut is set to ON or OFF as below depending on the status of i_bS_ChannelA and i_bS_ChannelB.
No. i_bS_ChannelA status
1 OFF
2 OFF
3 ON
4 ON
If the status of numbers 2 and 3 listed in the table above continues beyond i_dDiscrepancyTime, the safety FB detects an
error and the status becomes error.
State diagram
State transition of M+SF_EQUI_R
0>i_dDiscrepancyTime OR
i_dDiscrepancyTime>60000
Parameter
Error
C005H
1
0=<i_dDiscrepancyTime =<60000
2
Wait for
Channel B
8004H
1
3
i_dDiscrepancyTime
Over
Note 1: The transition from any state to the Idle state due to i_bActivate=OFF is not shown. However these transitions have the highest priority (0).
i_bS_ChannelB status
OFF
ON
OFF
ON
i_bActivate=OFF
Idle
0000H
1
0
i_bActivate=ON
1
init
8001H
2
4
3
1
2
Error 1
Wait for
C001H
Channel A
Error 2
8014H
C002H
1
3
i_dDiscrepancyTime
Over
2
Safety Output
enabled
8000H
o_bS_EquivalentOut output value
OFF
OFF
OFF
ON
2
1
From Active
Wait
8005H
o_bS_EquivalentOut= OFF
o_bS_EquivalentOut= ON
1
4 SAFETY FB SPECIFICATIONS
o_bReady=OFF
o_bReady=ON
1
Error 3
C003H
103
4.15 M+SF_EQUI_R
4