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FANUC Alarm INTP-587 — IBGN illegal speed unit

Manufacturer wording — IBGN illegal speed unit(%s,%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC INTP-587 (“IBGN illegal speed unit”): Illegal speed unit for IBGN record. First check: If Joint, use %.

Updated 2026-09-17 · LogrobotLM reference

Description

Illegal speed unit for IBGN record.

Remedy

If Joint, use %. If linear/circle, use mm/sec, cm/min or inch/min. Buffer for executing is full. Check the number of point in IBGN file. Teaching of IBGN instruction is not correct. Check whether IBGN END instruction is exist. Check whether IBGN END instruction is taught before IBGN instruction. File transfer by FTP protocol failed. Check setting for communication.

Related codes

INTP-585IBGN user frame changed during RECORDINTP-586IBGN jmp label during RECORDINTP-588IBGN Buffer is fullINTP-589IBGN teach error

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. How this reference is built →