Baldor 22H series Installation & Operating Manual page 94

Section 1
General Information
Table 5-4 Power Output Section Troubleshooting
INDICATION
Motor has wrong Analog input common mode voltage
response to may be excessive.
Speed Command
Incorrect MIN or MAX speed
settings.
Analog offset trim is incorrectly set.
Speed gain value is too large.
Motor Shaft Incorrect encoder alignment
Oscillates back direction.
and forth
Motor Shaft Incorrect encoder alignment
rotates at low direction.
speed regardless
of commanded
speed
Motor Shaft Incorrect encoder wiring.
rotates in wrong
direction
Motor Will Not Not enough starting torque.
Start Start
Motor overloaded.
Motor may be commanded to run
below minimum speed setting.
Incorrect Command Select
parameter.
Incorrect speed command.
Motor Will Not Max Output Speed set too low.
Reach Maximum Reach Maximum
Motor overloaded.
Speed
Improper speed command.
Speed potentiometer failure.
Motor Will Not MIN Output Speed parameter set
Stop Rotation too high.
Improper speed command.
Speed potentiometer failure.
Analog input common mode voltage
may be excessive.
Analog offset trim set incorrectly.
MN722
POSSIBLE CAUSE
Continued on next page.
CORRECTIVE ACTION
Connect control input source common to control common to minimize
common mode voltage. Maximum common mode voltage at terminals
J1-4 and J1-5 is 15VDC referenced to chassis common.
Check Level 2 Output Limits block, MIN Output Speed and MAX Output
Speed parameter values and adjust as needed.
Re-run "Offset Trim" autotune test.
Reduce the Level 1 Vector Control block, Speed PROP Gain and
Speed INT Gain parameter values.
Change the Feedback Align parameter in the Level 1 Vector Control block.
If Reverse, set to Forward. If Forward, set to Reverse.
Check encoder connections.
Change the Feedback Align parameter in the Level 1 Vector Control block.
If Reverse, set to Forward. If Forward, set to Reverse.
Reverse the A and A or B and B encoder wires at the J1 input to control
and change encoder direction in the Feedback Align parameter in the
Level 1 Vector Control block.
Increase Current Limit setting.
Check for proper motor loading.
Check couplings for binding.
Verify proper sizing of control and motor.
Increase speed command or reduce minimum speed setting.
Change Command Select parameter to match wiring at J1.
Verify control is receiving proper command signal at J1.
Adjust Level 2 Output Limits block, MAX Output Speed parameter value.
Check for mechanical overload. If unloaded motor shaft does not rotate
freely, check motor bearings.
Verify control is set to proper operating mode to receive speed command.
Verify control is receiving proper command signal at input terminals.
Check velocity loop gains.
Replace potentiometer.
Adjust MIN Output Speed parameter value.
Verify control is receiving proper command signal at input terminals.
Verify control is set to receive speed command.
Replace potentiometer.
Connect control input source common to control common (J1-1) to
minimize common mode voltage. Maximum common mode voltage at
terminals J1-4 and J1-5 is 15VDC referenced to chassis common.
Re-run "Offset Trim" autotune test.
Adjust the Level 1 Input block, ANA CMD Offset parameter to obtain zero
speed.
Continued
Troubleshooting 5-11