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Error output

Output for error message.

Data type: BOOL

Every error message (Error = TRUE) causes the outputs S_Mode0Sel to S_Mode7Sel to switch to SAFEFALSE and retain this state.

Note
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 leave the error state.

Resetting an error by means of a positive signal edge at the Reset input can cause the S_Mode0Sel to S_Mode7Sel output to switch to SAFETRUE immediately (depending on the status of the other inputs).

WARNING
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.

Note
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 S_Mode0Sel to S_Mode7Sel outputs are switched to SAFEFALSE.
FALSEThe function block is either inactive or has not detected an error.