Common Performance Problems - Parker 590+ DRV Product Manual

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Trips and Fault Finding

Common Performance Problems

Parameter Toggles Between Two Conditions
This problem occurs when two parameters write to a third parameter. The two parameters overwrite each other and fight for control of the problem
parameter.
No Speed Demand
If all the analog signals are connected to the proper terminals and have the correct sign, I DMD. ISOLATE may be set incorrectly. Monitor terminal
C8; if it is OFF, at 0VDC, terminal C8 may have been tagged for a non-standard function. Monitor parameter SETUP PARAMETERS::CURRENT
LOOP::I DMD. ISOLATE. It should be DISABLED for speed control. If it ENABLED, only a signal at terminal A3, ANIN 2, will create a current
demand needed to turn the motor.
Speed Setpoint has Unwanted Offset
Terminal A8, Total Speed Setpoint, is compiled from SETPOINTS 1 through 4. Monitor each setpoint individually in SETUP
PARAMETERS::SPEED LOOP::SETPOINTS. If one is incorrect, i.e. has been left at an undesired value, simply reset it to zero.
Signal does not get through Ramp
When parameter RAMP HOLD is ON, the ramp output is held to its last input value. Set RAMP HOLD to OFF to allow the signal change.
DC590+ DRV Series DC Digital Drive