Reset input
Edge-triggered input used for the following purposes:- Resetting error messages when the cause of the error is no longer present.
Hinweis
An error message caused by an additionally outstanding operation stop (permanent TRUE at ProcessControl although StaticControl = FALSE) can only be reset by switching ProcessControl to FALSE. A rising edge at Reset cannot reset this error type. - Manual resetting of an active start-up/restart inhibit (specified by S_StartReset and/or S_AutoReset).
Hinweis
Evaluation of the ProcessControl input in case of a requested additional operation stop (configuration with StaticControl = FALSE) only occurs after the start-up inhibit/restart inhibit has been removed by a positive edge at the Reset input.
Data type: BOOL
Initial value: FALSE
The Reset input supports manual resetting of an active start-up or restart inhibit by the operator (see EN ISO 13849-1).
Hinweis
Resetting does not occur with a negative (falling) edge, as specified by standard EN ISO 13849-1, but with a positive (rising) edge. To implement the reset with a falling edge (with regard to the mandatory acceptance procedure), use the safety-related function block SF_Reset. |
Additional measures, e.g., an additional function stop, can be taken to reduce the risk of an unintended start-up.
Connection: With the signal of a reset button connected to the Sicherheitssteuerung (value TRUE or FALSE). Constant TRUE or FALSE values are not permitted.
Value | Description |
---|---|
FALSE | Error resetting and removal of an active start-up inhibit are not requested. |
Edge FALSE > TRUE | Error resetting and
removal of an active start-up inhibit are requested. The function block performs internal edge monitoring for the Reset input. A reset is only executed on a positive signal edge. A further static TRUE signal after a positive signal edge has no effect. |
Resetting the function block by means of a positive signal edge at the Reset input can cause the S_OutControl output to switch to SAFETRUE immediately (depending on the status of the other inputs).
WARNUNG
|
Unintended start-up
|
Hinweis
If the function block is expecting a positive edge for resetting (inhibit is active or an error state applies), a static TRUE signal at Reset will be regarded as an error. In such cases, switch Reset to FALSE to exit the error state. |
If neither a start-up inhibit nor a restart inhibit is specified (S_StartReset = SAFETRUE and S_AutoReset = SAFETRUE), it is not necessary to connect a manual reset.
WARNUNG
|
Unintended start-up
|