Parker 6K8 - Page 41

Chapter 2. Troubleshooting 37
Problem Cause Solution
Motion does not occur. 1. “AXIS” LED is red, or “POWER”
LED is off or red.
1. See LED troubleshooting as noted above.
2. End-of-travel limits are active. 2.a. Move load off of limits or disable limits by sending the
LHØ
command to the affected axis.
2.b. Software limits: Set
LSPOS
to a value greater than
LSNEG
.
3. Step pulse too narrow for drive to
recognize (stepper axes only).
3. Set pulse width to drive specifications using the
PULSE
command.
4. Drive fault level incorrect. 4. Set drive fault level using the
DRFLVL
command.
5. Improper wiring. 5. Check drive fault & limit connections.
Stepper Axes: check step and direction connections.
Servo Axes: check command and shutdown connections.
6. ENABLE input is not grounded. 6. Ground the ENABLE input connection.
7. Load is jammed. 7. Remove power and clear jam.
8. No torque from motor.
8. See problem:
Torque, loss of
.
9. Max. position error (
SMPER
value)
exceeded. (servo axes only)
9. Check to see if
TAS
/
TASF
bit #23 is set, and issue the
DRIVE1
command to the axis that exceeded the position error limit.
10. Drive has activated the drive fault
input.
10. Check to see if
TAS
/
TASF
bit #14 is set, and check the drive
fault level (
DRFLVL
).
Power-up Program does
not execute.
1. ENABLE input is not grounded. 1. Ground the ENABLE input to GND and reset the product.
(see page 9)
2.
STARTP
program is not defined.
2. Check the response to the
STARTP
command. If no program is
reported, define the
STARTP
program and reset (refer to the
STARTP
command description).
Runaway
(SERVOS ONLY)
1. Direction connections reversed.
(if encoder counts positive when
turned clockwise or extended).
1. Switch CMD– with the CMD+ connection to drive or valve.
NOTE: The CMD+/– Connection is not differential. Do not connect
CMD+ to ground on your drive.
Torque, loss of. 1. Improper wiring. 1. Check wiring to the drive, as well as other system wiring.
2. No power to drive . 2. Check power to drive.
3. Drive failed. 3. Check drive status.
4. Drive faulted. 4. Check drive status.
5. Shutdown issued to drive. 5. Re-enable drive by sending the
DRIVE1
command to the affected
axis.