F31837 — Encoder 1 DRIVE-CLiQ: Component fault

F31837 reports that a fault has been detected on the DRIVE-CLiQ component concerned — on Encoder 1 this is the Sensor Module Encoder 1 — and Faulty hardware cannot be excluded. The message value tells you which component reported the fault and why, so read it before replacing anything. Depending on how the drive is configured, the same condition can also be output as an alarm or with no reaction at all. Faults with neighbouring numbers that also concern Encoder 1 on DRIVE-CLiQ — F31813, F31820, F31835, F31836, F31845, F31850, F31851, F31860 — are described on their own pages.

• Fault cause 32 (= 20 hex): error in the telegram header.
• Fault cause 35 (= 23 hex): receive error — the telegram buffer memory contains an error.
• Fault cause 66 (= 42 hex): send error — the telegram buffer memory contains an error.
• Fault cause 67 (= 43 hex): send error — the telegram buffer memory contains an error.

1. Check the DRIVE-CLiQ wiring for an interrupted cable and for faulty contacts.
2. Check the electrical cabinet design and the cable routing for EMC compliance.
3. If required, use another DRIVE-CLiQ socket (p9904).
4. Replace the component involved.

• The drive puts two pieces of information into the message value: the component number and the fault cause.
• Coded in the message value (r0949 for the fault, r2124 when it appears as an alarm) as 0000yyxx hex: yy = component number, xx = error cause.

• r0949 (fault value): read the coded message value of F31837 here — component number and fault cause in 0000yyxx hex.
• r2124 (alarm value): holds the same coded value when the condition is output as an alarm instead of a fault.
• p0491 (motor encoder fault response ENCODER): the manual's cross-reference for this fault — it sets the response the drive applies when Encoder 1 reports a component fault.
• p9904 (topology comparison acknowledge differences): named in the remedy for the changeover to another DRIVE-CLiQ socket; topology differences are acknowledged with it.

Remedy the cause first, then acknowledge the fault immediately — only after acknowledgement can the drive resume operation. In the alarm and no-reaction variants, reaction and acknowledgement are both omitted; the message then signals the component fault without the drive tripping, and the value can be read in r2124.