FANUC Alarm SRVO-221 — Lack of DSP (G:%d A:%d)
FANUC SRVO-221 (“Lack of DSP (G:%d A:%d)”): The DSP (servo control CPU) for this axis was not found, though it was specified in the system variable $AXISORDER. First check: 1. Check that the number of DSPs on the board for DSP is sufficient for the quantity specified in $SCR_GRP[].$AXISORDER[].
Updated 2026-08-29 · LogrobotLM reference
Description
The DSP (servo control CPU) for this axis was not found, though it was specified in the system variable $AXISORDER.
Remedy · Remède
1. Check that the number of DSPs on the board for DSP is sufficient for the quantity specified in $SCR_GRP[].$AXISORDER[]. 2. Replace the board for the DSP with one having sufficient DSPs if necessary. 3. Alternatively, change the setting of $AXISORDER.
Frequently asked · Questions fréquentes
- What does FANUC alarm SRVO-221 mean?
- FANUC SRVO-221 (“Lack of DSP (G:%d A:%d)”): The DSP (servo control CPU) for this axis was not found, though it was specified in the system variable $AXISORDER.
- How do you troubleshoot FANUC alarm SRVO-221?
- 1. Check that the number of DSPs on the board for DSP is sufficient for the quantity specified in $SCR_GRP[].$AXISORDER[]. 2. Replace the board for the DSP with one having sufficient DSPs if necessary. 3. Alternatively, change the setting of $AXISORDER.
Related codes / Codes liés
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →