AL-51 indicates an excessive positional error. The manual's first action is: “Check the excessive position command pulse setting [P4-11], wiring, limit contact point, gain setting, encoder setting, and electric gear ratio. Check the load on the equipment and whether there is binding on the equipment.”
- Model
- LS ELECTRIC L7SB Series (400V)
- Display shows
- Position following (AL-51)
- Type
- Error code
- Source
- Manual p. 141
What AL-51 means
Position following p. 141
Common causes
- Excessive positional error p. 141
What to do
- Check the excessive position command pulse setting [P4-11], wiring, limit contact point, gain setting, encoder setting, and electric gear ratio. Check the load on the equipment and whether there is binding on the equipment. p. 141
If AL-51 is still not resolved
The manual gives no further instruction for this code. Open the code table in the PDF or contact LS ELECTRIC service.
This page summarises what the manufacturer’s manual says about AL-51; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with LS ELECTRIC. Found a mistake? Report an error.