Introduction
A fault and a limit value violation can be acknowledged via a safe digital input F‑DI or via the "Fault acknowledgment" bit of the safe process data.
To acknowledge a fault or a limit value violation via a safe digital input, an input must be set to "Acknowledge faults" or "Unlatch latched F-DI and acknowledge faults".
Acknowledgment is performed by a 0 → 1 edge. In the following cases, a warning will be indicated after 20 s:
- a permanent high signal is present on the safe digital input to which the acknowledgment has been assigned.
- one of the fault acknowledgment bits in the process data is permanently "1".
To acknowledge faults via PROFIsafe, Safety over EtherCAT® or CIP Safety™, the exchange of safe data of the safety option must be fault-free. Faults in the safety option can then be acknowledged by a rising edge via the "Fault acknowledgment" bit in the safe process output data.
A critical fault can only be acknowledged by switching the supply voltage off and on.
DANGER
Depending on the connection, MOVISAFE® CS..A can deactivate the STO safety sub-function after the acknowledgment. This can cause an immediate restart of the system.
Severe or fatal injuries.
- Make sure that no persons enter the hazardous area of the system during acknowledgment.
- Make sure that the STO safety sub-function is active via F-DI or safe communication during the acknowledgment.
Existing limit violations of the safety sub-functions are deleted by parameterizing, creating the acceptance report, and publishing the acceptance. Start inhibit is set to prevent the system from switching to operation afterwards.
