The deviation between command and feedback positions has exceeded the set value for basic parameter 54, indicating excessive positional error. The manual's first action is: “The initial set value of basic para. 54 is 10000 (× 100) [pulse]. If the difference between the current command position and current feedback position exceeds 1000000 [pulse], an alarm is detected. Under normal operating conditions, the deviation quantity increases in proportion to the motor speed. If an alarm is detected when rotating the motor by turning on the [RUN], the motor power wiring phases U, V, W may not be connected to the corresponding terminals (U, V, W) of the amplifier. The set value of basic para. 54 need not be decreased. The deviation quantity can be reduced by setting the feed forward gain of basic para. 40 to near 1.000.”
- Model
- RYS MHT260a
- Display shows
- Overflow, deviation excessive (AL OF)
- Type
- Alarm code
- Source
- Manual p. 247
What AL OF means
Overflow, deviation excessive p. 252
Common causes
- Overflow, deviation excessive p. 252
- Deviation quantity (difference between the current command position and current feedback position) exceeded the set value of basic para. 54. p. 252
What to do
- The initial set value of basic para. 54 is 10000 (× 100) [pulse]. If the difference between the current command position and current feedback position exceeds 1000000 [pulse], an alarm is detected. Under normal operating conditions, the deviation quantity increases in proportion to the motor speed. If an alarm is detected when rotating the motor by turning on the [RUN], the motor power wiring phases U, V, W may not be connected to the corresponding terminals (U, V, W) of the amplifier. The set value of basic para. 54 need not be decreased. The deviation quantity can be reduced by setting the feed forward gain of basic para. 40 to near 1.000. p. 252
Before you service the product, read the safety instructions in the manual p. 3.
If AL OF 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 OF; 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.