Error output

Output for error message.

Data type: BOOL

Every error message (Error = TRUE) causes the enable signal at the S_GuardLocked output 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 exit the error state.¹

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).

Value	Description
TRUE	The function block has detected an error. The enable signal at the S_GuardLocked output switches to SAFEFALSE.
FALSE	The function block is either inactive or has not detected an error.

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

WARNING
	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. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

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.

Failure to follow these instructions can result in death, serious injury, or equipment damage.