Encoder fault muting

WARNING

The active "Encoder fault muting" function deactivates the encoder-dependent safety sub-functions (except STO). This can cause the system to start up immediately.

Severe or fatal injuries.

• Before activating the "Encoder fault muting" function, the user must take organizational measures for the protection of personnel and machinery.

The "Encoder fault muting" function can be activated by a safe digital input F-DI, by the safe process output data (F-PO) or by starting the emergency mode with the keypad. The activated "Encoder fault muting" function is signaled on the LED F-ERR by rapid yellow flashing. The "Encoder fault muting" function has the following effects:

• Opening of the internal safe digital output F-DO_STO is suppressed due to the encoder fault response.
• The fault responses of all safety sub-functions are suppressed.
• The Muting bit is set in the safe process input data.
• The Fault status bit is set in the safe process input data.
• The safe process data bit F-PI-ErrorState remains set.
• The error code continues to be displayed.
• The STO safety sub-function can continue to be used without restrictions. All safety sub-functions used by encoders that are muted must be deactivated.

The "Encoder fault muting" function is automatically terminated in the following cases:

• Another fault (e.g. input fault) is present or has been detected.
• A fault is acknowledged.
• 1 to 60 minutes after activation via F-DI or F-PO. This time period is adjusted via the Maximum muting time parameter.
• 5 minutes after activation via the emergency mode.

If the "Encoder fault muting" function has been automatically deactivated, all sources must first cancel activation before another activation.

Each time the "Encoder fault muting" function is terminated, the start inhibit is activated.