FS – output fault, FS – input fault, FS – encoder fault

FS – output fault

If the safety option detects an error at a safe digital output, all safe digital outputs are switched to the safe state. In addition, the STO safety sub-function is activated and the safety option is set to the safe state. In the FS protocol, the bits of the outputs F-DO00 and F-DO01 are set to "0" and the bits for the STO safety sub-function and the fault are set to "1".

In addition, the corresponding error code is transferred for the FS output error that occurred.

FS – input fault

If the safety option detects an error at a safe digital input, the affected safe digital input is switched to the safe state. If the affected safe digital input is parameterized as dual-channel, both inputs are switched to the safe state. In the FS-protocol, the bits of the affected safe digital inputs are set to "0" and the error bit is set to "1".

In addition, the corresponding error code is transferred for the FS input error that occurred.

INFORMATION

If a safe digital input is assigned to a safety sub-function via function assignment, then this safety sub-function is selected in the event of an FS input fault.

At a safe digital input with detected error, the error must first be resolved and the safe state established before acknowledging the FS input fault. In this way, a safety sub-function is not erroneously selected after acknowledgment of an FS input fault.

FS – encoder fault

If the safety option detects a fault in the encoder system, this results in a warning if no safety sub-function is activated. The safety option continues to remain operational. If at least one safety sub-function is active, this leads to an FS encoder fault. The safety sub-functions switch to the relevant fault state. The corresponding fault code for the FS encoder fault that occurred is transferred.

In the case of faults in the encoder system that are assigned to the fault class "FS Encoder fault" or "FS System fault", the corresponding fault response is initiated as soon as the fault or error is detected.

Acknowledging the FS encoder fault with activated safety sub-function leads to a restart of the safety sub-function.

INFORMATION

Acknowledgment of a limit violation leads to a different behavior of the activated safety sub-function than the acknowledgment of an FS encoder fault.

The response to an FS encoder fault can be suppressed using the "Encoder fault muting" function or emergency mode. The "Encoder fault muting" function can be activated at a safe digital input or via the safe process data. For further information, refer to the chapter Encoder fault muting.

FS – system fault

In the case of an FS system fault, all safe digital inputs and all safe digital outputs are switched to the safe state. In addition, the STO safety sub-function is executed without delay and the outputs F-DO00 and F-DO01 are disabled. The safety option is set to the safe state.

In the FS protocol, the bits of the safe digital outputs F-DO00 and F-DO01 and the safe digital inputs F-DI00, F-DI01, F-DI02 and F-DI03 are set to "0". The bits for the STO safety sub-function and the fault are set to "1".

In addition, the corresponding error code is transferred for the FS system fault that occurred.

INFORMATION

If the safe digital output is assigned to a safety sub-function via the function assignment, this safety sub-function is selected in the case of an FS system error.

FS – critical fault

In the case of a critical fault, the safety option is set to the safe state. All safe digital inputs and all safe digital outputs are switched to safe state. In addition, the STO safety sub-function is executed without a delay. The sensor supply for the safe digital inputs is also switched to de-energized state. Active safe communication is suspended.

In addition, the corresponding fault code is transferred for the critical fault that occurred.