F31835 — Encoder 1 DRIVE-CLiQ: Cyclic data transfer error

F31835 reports that cyclic data transfer over DRIVE-CLiQ between the Control Unit and Encoder 1 has failed: a communication error has occurred from the Control Unit to the encoder concerned, and the nodes no longer send and receive in synchronism. The component this code points to is the Sensor Module Encoder 1. The manuals describe the fault for the G130, G150, S120 and S150 with the same wording. Depending on how the drive is configured, the very same condition can also be output as an alarm (A) or with no reaction at all (N) instead of a fault.

• A DRIVE-CLiQ communication error has occurred from the Control Unit to the encoder concerned.
• The nodes do not send and receive in synchronism.

1. Read the coded message value in r0949 (fault) or r2124 (alarm): it holds 0000yyxx hex, where yy is the component number and xx the fault cause.
2. Carry out a POWER ON.
3. If the fault occurs again afterwards, replace the component involved — for this code that is the Sensor Module Encoder 1.

• The drive writes two pieces of information into the message value: Component number: %1, fault cause: %2.
• In r0949 (fault value) and r2124 (alarm value) this is coded as 0000yyxx hex, where yy = component number and xx = error cause.
• xx = 33 (= 21 hex): the cyclic telegram has not been received.
• xx = 34 (= 22 hex): timeout in the telegram receive list.
• xx = 64 (= 40 hex): timeout in the telegram send list.

• r0949 (fault value) — read the coded message value of F31835 here to identify the component number and the fault cause.
• r2124 (alarm value) — holds the same coding when the condition is output as an alarm.
• p0491 (motor encoder fault response ENCODER) — the manual cross-refers to this parameter together with the fault; it governs the motor encoder fault response (ENCODER) that applies while this fault is active.
• p9916 (DRIVE-CLiQ data transfer error shutdown threshold slave, DQ fault slave) — named in the G130/G150 entry alongside the remedy for this fault.

The remedy is the same in both manuals: carry out a POWER ON, and if the fault then reappears, replace the component involved (for this code, the Sensor Module Encoder 1). After the cause has been rectified, acknowledge the fault — where the manual specifies an acknowledgement mode for your drive object, it is IMMEDIATELY.