Operating the Drive 4-15
DC590+ Series DC Digital Drive
Step 13: Check the Speed Feedback sign
With the motor rotating in the correct direction, check the sign of the feedback from the Tachometer or Encoder using the
appropriate Diagnostic menu: TACH INPUT or ENCODER.
• If the diagnostic value is positive (correct), stop the drive. Re-instate your selection for the SPEED FBK
SELECT parameter (if other than ARM VOLTS FBK) and run the drive to check operation. If the test is
successful go to Step 14.
• If the diagnostic value is negative:
¾ Analog Tach: reverse the connections of the analog tach on terminals G3 and G4
¾ Encoder: change the sign of the encoder feedback parameter.
Re-instate your selection for the SPEED FBK SELECT parameter (if other than ARM VOLTS FBK) and run the
drive to check operation.
IMPORTANT
When satisfactory operation has been achieved, perform a PARAMETER SAVE. Refer to Chapter 6: “The Keypad” -
Saving Your Application.
Step 14: Adjusting the Speed Setpoint
With the MAIN CURR.LIMIT parameter set to 20% or to the level required to achieve rotation, set the Speed Setpoints so that the value of the
SPEED SETPOINT is about 10%, 1.0V at setpoint input (Terminal A8). The motor will accelerate to this speed setting.
Step 14.1 4 Quadrant Drives which require reverse rotation:
Alter the Speed Setpoints so that the value of the SPEED SETPOINT parameter is about -10% and check that motor
runs in the reverse direction.
Step 14.2 Adjustment of ZERO SPEED OFFSET parameter (Ensure STANDSTILL is DISABLED as in Step 11):
• 4 Quadrant, non-reversing drives
Set the Speed Setpoint potentiometer to zero and adjust the ZERO SPEED OFFSET parameter for minimum
shaft rotation.
• 2 Quadrant, non-reversing drives
Set the Speed Setpoint potentiometer to zero and adjust the ZERO SPEED OFFSET parameter until the shaft is
just rotating then reduce level until the shaft stops.
• 4 Quadrant, reversing drives
Set the ZERO SPEED OFFSET parameter to balance maximum speed in forward and reverse directions. You
can also set STANDSTILL LOGIC parameter to ENABLE if a stationary shaft is required.
MMI Menu Ma
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