FEC DSP1500 (SAN3) - Manual (Page 8)

enFORCE Operation Manual
PAGE 8 - 8
Chapter 8: Troubleshooting
8.6 Servo Amplifier Response Errors [ A5_* ]
• Code A5_0 - SERVO AMPLIFIER REPLY ERROR / NO REPLY FROM RESOLVER
The controller is attempting to turn the motor, but is not receiving any signals back from the
resolver to indicate that the tool is actually turning.
CAUSE:
1. The motor/resolver cable is damaged or not connected
2. When the resolver, motor, or the controller malfunctions.
3. If there is excessive binding in the transmission or the press shaft assembly keeping the
motor from turning.
4. System Parameter 00-06 (No Load Current) is not set to the correct value.
5. When running short cycle times the brake reaction time may not be fast enough causing the
brake to drag during the first few milliseconds of the press cycle.
6. If switching Data Banks, brake engages (turns off).
RECOVERY:
1. Verify that the motor cable is connected and not damaged.
2. Connect all spare tool cables to the existing tool.
3. Exchange tool and/or controller with known working units. Reinitialize the system after
exchanges.
4. Verify that system parameter 00-06 is set to the correct default value. If weight is installed on
the press ram and this abnormal occurs, the value may have to be increased.
5. Inspect and correct any binding in the transmission or press shaft.
6. Verify that the brake is operating correctly.
7. For item 5 above: The brake is designed to be used for maintenance, not for control. Set
Parameter 00, Data No. 0F to “Dynamic Hold - On” (this allows motor to control holding of
press). See Page 4-27 for brake setup.
If brake must be used for control on short cycle time applications, incorporate a timer to delay
the start until the brake has time to react.
8. For item 6 above: When switching Data Banks the meaning of the BUSY signal will change.
Provide a means to keep the brake disengaged (on) while changing Data Banks. See Page
4-27 for brake setup.