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FANUC Alarm SRVO-087 — WARN BLAL alarm (Track enc:…)

Warning
Hardware
line tracking encoder
Controllers
R-J3iB / R-30iA / R-30iB
FANUC class
WARN
Hardware family
FANUC line tracking encoder alarms

Manufacturer wording — WARN BLAL alarm (Track enc:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC SRVO-087 (“WARN BLAL alarm (Track enc:…)”): This alarm is issued when the battery voltage for backing up the absolute position data of the pulse coder has dropped. First check: Refer to the description of the SRVO-065 BLAL alarm.

Updated 2026-10-22 · LogrobotLM reference

Description

This alarm is issued when the battery voltage for backing up the absolute position data of the pulse coder has dropped.

Remedy

Refer to the description of the SRVO-065 BLAL alarm.

Field diagnosis

The line tracking encoder backup battery voltage is below the minimum.

What to check

  • Replace the batteries without delay, with the power on, as for SRVO-065.
  • Note: Warning: act before BZAL occurs.

Related codes

SRVO-065WARN BLAL alarmSRVO-084WARN BZAL alarm (Track enc:…)SRVO-085WARN RCAL alarm (Track enc:…)SRVO-086WARN PHAL alarm (Track enc:…)SRVO-088WARN CSAL alarm (Track enc:…)SRVO-089WARN OHAL2 alarm (Track enc:…)

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 →