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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_AOPD_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.1

If the error state has been caused by a muting error, it can also be exited by the override function.

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

Connection: If required, the signal can be transmitted externally for diagnostic purposes (via a global I/O variable or other functions/function blocks).

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

1Resetting the error by activating the reset button can cause the S_AOPD_Out output to switch to SAFETRUE immediately (depending on the status of the other input signals).

WARNUNG
Unintended start-up
  • Verify the impact of resetting an error 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 taken to help avoid hazardous situations when resetting an error.
  • Do not enter the zone of operation when resetting an error.
  • Ensure that no other persons can access the zone of operation when resetting an error.
  • Use appropriate safety interlocks where personnel and/or equipment hazards exist.