F32813 — Encoder 2: Hardware logic unit failed

F32813 reports that the logic unit of the DRIVE-CLiQ encoder wired as Encoder 2 — the component the manuals call Sensor Module Encoder 2 — has failed. The encoder announces the failure itself: its ALU either lets the watchdog respond or detects a sign-of-life error, and the encoder fault word then supplies the matching fault bits to the drive. The manuals for the G130, G150, S120 and S150 describe the condition almost identically and decode the fault value the same way, so everything on this page applies to all of these converters.

• The logic unit of the DRIVE-CLiQ encoder has failed. One manual words the cause as The logic unit of the DRIVE-CLiQ encoder has failed, the other as a DRIVE-CLiQ encoder fault word that supplies fault bits that have been set — two phrasings of the same encoder-side condition.
• Bit 0 of the fault value names the first way the logic is judged failed: the ALU watchdog has responded.
• Bit 1 of the fault value names the second: the ALU has detected a sign-of-life error.

1. Read the binary fault value in r0949 to see which report the encoder logic issued — bit 0 (ALU watchdog) or bit 1 (ALU sign-of-life).
2. Replace the encoder. One manual adds the condition When the error reoccurs, replace the encoder.; the other gives the same remedy without the recurrence condition. No further checking steps are given.

• The drive stores the fault cause in r0949 as a binary value (message value: fault cause, binary).
• Bit 0: ALU watchdog has responded.
• Bit 1: ALU has detected a sign-of-life error.

• r0949 (fault value) — read it here, interpreted as a binary number, to determine whether the Encoder 2 ALU watchdog responded (bit 0) or the ALU detected a sign-of-life error (bit 1).

Acknowledgment requires pulse inhibit: the drive responds to this fault with an OFF1 stop, so let it come to a standstill, then acknowledge F32813 and restart. The fault can only be cleared once the pulses are inhibited, and an acknowledged drive can be started again.