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Error output

Output for error message.

Data type: BOOL

Every error message (Error = TRUE) causes the enable signal at the S_OSSD_Out output to switch to SAFEFALSE and retain this state.

Hinweis
Additional measures, e.g., an additional function stop, can be taken to reduce the risk of an unintended start-up.

The error state (Error = TRUE) can only be exited if there is a positive signal edge at the Reset input. If the error state has been caused by a static TRUE signal at the Reset input, this must be switched to FALSE in order to exit the error state.

Resetting the function block by means of a positive signal edge at the Reset input can cause the S_OSSD_Out output to switch to SAFETRUE immediately (depending on the status of the other inputs).

WARNUNG
Unintended start-up
  • Include in your risk analysis the impact of the reset by means of a positive signal edge at the Reset input.
  • Make certain that appropriate procedures and measures (according to applicable sector standards) have been established to help avoid hazardous situations when resetting.
  • Do not enter the zone of operation when resetting.
  • Ensure that no other persons can access the zone of operation when resetting.
  • Use appropriate safety interlocks where personnel and/or equipment hazards exist.

Hinweis
The error state of the function block can only be exited if the cause of the error no longer exists.

Connection: Connect the Error output to a global I/O variable or via additional functions/function blocks in order to transmit the signal externally for diagnostic purposes.

ValueDescription
TRUEThe function block has detected an error. The enable signal at the S_OSSD_Out output switches to SAFEFALSE.
FALSEThe function block is either inactive or has not detected an error.