Mitsubishi Electric AL.1E

Brand: Mitsubishi ElectricModel: PLC (FX5U / iQ-R / iQ-F Series)Error code: AL.1E

What the Fault Means

Encoder initial communication error

Likely causes

  • Encoder does not respond on power-up; cable break; wrong encoder type

Solution and Safe First Checks

  1. Check encoder cable; verify encoder model matches servo parameter (PA01)

Safety: do not work inside the panel without isolating the power; if unsure, consult a qualified technician.

Related Mitsubishi Electric error codes

Source: the Zeror.ai industrial fault database and Mitsubishi Electric technical documentation. This page is for information; on critical systems follow the manufacturer's manual and authorised service.

Mitsubishi Electric AL.1E · Zeror.ai