MDC Manual 1109KB - Red Lion Controls

TROUBLESHOOTING GUIDE (Cont’d)
PROBLEMS POSSIBLE CAUSE REMEDIES
UNIT WILL NOT ENTER JOG MODE 1. R-STOP, F-STOP inputs wired incorrectly.
UNIT INDICATES ZERO SPEED
(MOTOR RUNNING)
MOTOR WILL NOT RUN WITH
MDC IN “RUN” MODE
“NO FEEDBACK” MESSAGE
DISPLAYED/UNIT ENTERS
STOP MODE
2. Unit in Program mode.
3. Unit is in RUN mode.
1. No feedback signal.
2. Type of input signal incorrectly selected.
3. Scaling parameters programmed incorrectly.
PPR, MAX RPM too large or DSP UNIT too small.
1. Motor or Drive problem.
2. Internal/External jumper for Drive Output in wrong
position.
3. MDC Isolated Drive Output improperly calibrated.
4. Speed or Ratio setpoint zero or too low.
5. In Follower mode and Lead input is zero.
1. No feedback signal present.
2. Drive improperly calibrated.
3. MDC Isolated Drive Output improperly calibrated.
4. Large “dead band” in drive and motor response at
low speed.
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1. R-STOP and F-STOP inputs must be held low
or tied to comm. to enter JOG mode.
2. JOG is disabled. Exit the programming module.
3. Place unit in STOP mode.
1. Check sensor connection. Verify power to sensor.
2. Check DIP switch setting on side of unit.
3. Check parameters in Program Scaling Menu.
Verify correct FB freq. in Program Diagnostics
Menu TEST DRV OUT.
1. Make sure motor and drive operate independent
of MDC.
2. Refer to Installation and Connections section of
manual.
3. See Isolated Drive Output Calibration section
of manual. Verify operation using Program
Diagnostics Menu TEST DRV OUT.
4. Check speed/ratio Setpoint 1 and 2.
5. Verify by programming a DISPLAY for Lead
frequency.
1. Check sensor connection. Verify power to sensor.
2. See drive manual.
3. See Isolated Drive Output Calibration section
of manual.
4. Disable Feedback Loss Detection in the
Program Options Menu.