SRVO-074: LDAL alarm (pulse coder LED broken)
The LED inside the optical encoder has failed - the encoder can no longer read its own disc.
What it means
The LED inside the optical encoder has failed - the encoder can no longer read its own disc. No troubleshooting ladder on this one; it's a hardware death certificate.
Common causes
Ranked by what technicians most often find, most likely first.
- Failed LED in the pulse coder. That's the list.
How to fix it
- Replace the pulse coder (motor), then perform mastering. Power-cycle to clear.
Quick facts
- Category
- Servo
- Affected series
- R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
- Alarm family
- SRVO
Related codes
- SRVO-073CMAL alarm (pulse coder noise/fault)
- SRVO-072PMAL alarm (pulse coder fault)
- SRVO-076Tip Stick Detection
- SRVO-071SPHAL alarm (feedback speed excess)
- SRVO-070STBERR alarm (pulse coder framing error)
- SRVO-078Servo param update
- SRVO-069CRCERR alarm (pulse coder data corrupt)
- SRVO-079Stroke exceeded during press