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4 Safety Function Blocks
NX-series Safety Control Unit Instructions Reference Manual (Z931)
4
SF_MutingPar_2Sensor
S_StartReset = TRUE, Reset = FALSE, and S_MutingLamp = TRUE
Error Detected
The FB detects the following errors.
• DiscTimeEntry is set to less than T#0s or more than T#4s.
• MaxMutingTime is set to less than T#0s or more than T#10min.
• The discrepancy time for the sensor pair (S_MutingSwitch11 and S_MutingSwitch12) exceeded
the set value.
• Muting (S_MutingActive = TRUE) exceeded MaxMutingTime (maximum muting time).
• The muting sensors (S_MutingSwitch11 and S_MutingSwitch12) operated in an incorrect order.
• A muting sequence started without being enabled by MutingEnable.
• A muting sensor signal that is always TRUE was detected.
• A muting lamp failure was indicated (S_MutingLamp = FALSE).
• An undetected change to TRUE in the Reset input was detected in the Init state or the Wait for
Reset state.
Operation for Errors
• When an error occurs, the S_AOPD_Out and S_MutingActive outputs are set to FALSE. The
DiagCode output gives the relevant error code and the Error output is set to TRUE.
• Operation is not restarted until the error is reset and the operator acknowledges the safe state
with Reset.
FB-specific Error Codes
Timing Charts
Instruction Execution Errors
DiagCode (hexadecimal)
DiagCode
(decimal)
Status name Status description and output results
C001 49153 Reset Error 1 When the Init state was entered, an undetected
change to TRUE in the Reset input was detected.
Ready = TRUE
S_AOPD_Out = FALSE
S_MutingActive = FALSE
Error = TRUE
Activate
S_AOPD_In
MutingEnable
S_MutingSwitch11
S_MutingSwitch12
S_AOPD_Out
S_MutingActive
Error
DiagCode
8000 / 80110000 / 8000
8012 8012 8000 8000 8000 8000 8000 8000 8000 8000