IAI America PCON-CY - Manual (Page 111)

101
7. T
roubleshooting
(2) Cold Start Alarms
Code Error Cause/action
0B8 Excitation detection error This controller detects the excited phase when the servo is turned on for the first time
after turning on the power. This alarm indicates that the specified encoder signal level
cannot be detected after excitation for the time set by Parameter No. 29 (Excited
phase signal detection time).
Cause:
[1] The connector of the motor relay cable is loose or its circuit is open.
[2] If the actuator is equipped with a brake, the brake cannot be released.
[3] The load increased due to application of external force.
[4] The power was turned on when the actuator was contacting a
mechanical end.
[5] The sliding resistance of the actuator itself is high.
Action: [1] Check the wiring condition of the motor relay cable.
[2] Check the wiring condition of the brake cable, and also turn on/off the
brake release switch to check if “click” sound is heard.
[3] Check the assembly condition of mechanical parts for any abnormality.
[4] Move the actuator away from the mechanical end, and then turn on the
power again.
[5] If the load is normal, cut off the power and move the actuator by hand to
check the slide resistance.
If the actuator itself is suspected as the cause, contact IAI.
0E5 Encoder receive error Cause: [1] When the 24-V power is turned on, the controller is powered up before
the simple absolute unit.
[2] When the detail code is H’0001:
The controller cannot communicate with the simple absolute unit
properly due to noise, etc.
[3] When the detail code is H’0002:
The controller cannot communicate with the simple absolute unit
properly due to disconnection of the communication wire in the encoder
cable, etc.
Action: [1] Always turn on the power to the simple absolute unit before
(or simultaneously as) the controller power.
[2] Change the installation location of the controller. Implement noise
measures such as installing a FG, noise filter or clamp filter.
[3] Check the encoder relay cable between the controller and simple
absolute unit for a loose connector or connectors. If both connectors on
the cable are engaged properly, replace the cable.
0E8 Open phase A/B detected Encoder signals cannot be detected correctly.
0E9 Open phase A detected
0EA Open phase B detected
Cause: [1] The connector of the encoder relay cable is loose or its circuit is open.
[2] The connector of the supplied actuator cable is loose or its circuit is
open.
Action: Check the connection condition of the encoder relay cable and perform
continuity check. If no abnormality is found, contact IAI.