Communication between the 16-bit serial encoder and amplifier is failing, likely due to wiring issues or improper connections. The manual's first action is: “The serial communication is performed at 4 [Mbps] of data rate. Do not extend the wiring by connecting several short cables. Connect the encoder by optional cable or specified cables. The encoder wiring has about 5 [V] of voltage amplitude. Do no install it in a location where a strong electric or magnetic field exists.”
- Model
- RYS MHT260a
- Display shows
- Encoder communication error (AL EC)
- Type
- Alarm code
- Source
- Manual p. 247
What AL EC means
Encoder communication error p. 251
Common causes
- Encoder communication error p. 251
- The communication is not made between 16-bit serial encoder and amplifier. p. 251
- The encoder wiring may be detached or disconnected. p. 251
What to do
- The serial communication is performed at 4 [Mbps] of data rate. Do not extend the wiring by connecting several short cables. Connect the encoder by optional cable or specified cables. The encoder wiring has about 5 [V] of voltage amplitude. Do no install it in a location where a strong electric or magnetic field exists. p. 251
Before you service the product, read the safety instructions in the manual p. 3.
If AL EC is still not resolved
- Contact Fuji for special systems or applications such as atomic-energy control, aerospace use, medical use, and traffic control. p. 4 “Customers, who want to use the products introduced in this manual for special systems or devices such as for atomic-energy control, aerospace use, medical use, and traffic control, are requested to consult the Fuji.”
This page summarises what the manufacturer’s manual says about AL EC; 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 RYS. Found a mistake? Report an error.