Shihlin Electric & Engineering Corporation - Shihlin - Ranked No.1 electrical manufacturer in Taiwan with more than 70 years' experience.

What should we do when error OPT occurs? | Shihlin Electric

1. Check whether the communication cable connection is abnormal or disconnected 2. Check whether the communication protocol parameters of the upper controller (PC or PLC or other equipment) match with the parameters set by the inverter. 3. Check whether the alarm is caused by interference. ( The communication is normal or not when the inverter isn't operating or not connected to the motor.) 4. If it is confirmed to be caused by interference, please improve the wiring. Apply shielded wire and connect the shielding layer to the system communication ground at both ends. Find quick answers in the Shihlin Electric FAQ—selection, wiring and troubleshooting for circuit breakers, magnetic contactors, AC drives, servo, HMI and PLC control.

FAQ: What should we do when error OPT occurs?

Shihlin Electric FAQ: Selection, Wiring & Troubleshooting

What should we do when error OPT occurs?

1. Check whether the communication cable connection is abnormal or disconnected
2. Check whether the communication protocol parameters of the upper controller (PC or PLC or other equipment) match with the parameters set by the inverter.
3. Check whether the alarm is caused by interference. ( The communication is normal or not when the inverter isn't operating or not connected to the motor.)
4. If it is confirmed to be caused by interference, please improve the wiring. Apply shielded wire and connect the shielding layer to the system communication ground at both ends.

What should we do when error OPT occurs? | Shihlin Electric

The Shihlin Electric Company Profile introduces a Taiwan-based manufacturer with 70+ years of engineering experience supporting low-voltage power distribution and motor control for industrial customers.

Our scope covers circuit breakers, switchgear and power distribution systems, magnetic switches and magnetic contactors—plus factory automation solutions including inverters, AC drives, servo motors and drives, HMI, controllers, PLC and system integration.

With long-term OEM/ODM collaboration and a growing global network, Shihlin Electric helps you standardize components, reduce downtime, and move from product selection to commissioning with practical technical support.