Trips and Fault Finding
7-29
DC590+ DRV Series DC Digital Drive
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.
Summary of Contents for 590+ DRV
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Page 126: ...3 88 Installing the Drive DC590 DRV Series DC Digital Drive...
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Page 166: ...5 8 Control Loops DC590 DRV Series DC Digital Drive...
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Page 274: ...A 30 Serial Communications DC590 DRV Series DC Digital Drive...
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Page 292: ...B 16 Certification DC590 DRV Series DC Digital Drive...
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Page 330: ...C 36 Parameter Specification Tables DC590 DRV Series DC Digital Drive...
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Page 368: ...D 20 Programming DC590 DRV Series DC Digital Drive Functional Description...
Page 496: ...D 148 Programming DC590 DRV Series DC Digital Drive Programming Block Diagram Sheet 1...
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