4 Safety Function Blocks
4 - 118
NX-series Safety Control Unit Instructions Reference Manual (Z931)
Error Detected
The following conditions force a transition to an error state.
• The test time was exceeded without sensor feedback extension.
• A test without sensor signal feedback
• Invalid always-TRUE Reset signal during processing
• Plausibility check of the monitoring time setting
Operation for Errors
• When an error occurs, the S_OSSD_Out output is set to FALSE and the safe state is maintained.
• When the error is removed, the sensor turns ON (S_OSSD_In = TRUE). When the Reset input
changes to TRUE, FB error status is reset and the S_OSSD_Out output is set to TRUE.
•If S_AutoReset is FALSE, a request to make it TRUE is made when the FB is reset.
•After S_OSSD_In changes to TRUE, you can reset the FB by making the Reset input TRUE.
• After the FB starts, you can reset the FB by making the Reset input TRUE.
FB-specific Error Codes
Instruction Execution Errors
DiagCode (hexadecimal)
DiagCode
(decimal)
Status name Status description and output results
C000 49152 Parameter Error The Te stTime parameter is set to an invalid
value. The setting range is from 0 to 150 ms.
Ready = TRUE
S_OSSD_Out = FALSE
S_TestOut = TRUE
TestPossible = FALSE
TestExecuted = FALSE
Error = TRUE
C001 49153 Reset Error 1 When the FB is activated, an undetected change
to TRUE in the Reset input was detected.
Ready = TRUE
S_OSSD_Out = FALSE
S_TestOut = TRUE
TestPossible = FALSE
TestExecuted = FALSE
Error = FALSE
C002 49154 Reset Error 2 When state 8003 (Wait for Reset 1) was entered,
an undetected change to TRUE in the Reset
input was detected.
Ready = TRUE
S_OSSD_Out = FALSE
S_TestOut = TRUE
TestPossible = FALSE
TestExecuted = FALSE
Error = TRUE
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