590 Series DC Digital Drive Programming
D-29
CALIBRATION
This function block contains motor-specific parameters.
When CONFIGURE ENABLE = TRUE, the operation of the Block Diagram is suspended and all
Keypad LEDs will flash.
CALIBRATION
Parameter Tag Range
ARMATURE V CAL. 20 0.9800 to 1.1000
Trim adjustment of the motor armature volts to give exactly 100% at the required actual voltage value (e.g. 460V etc.).
Note: - Primary voltage calibration is achieved by adjusting SW7.
IR COMPENSATION 21 0.00 to 100.00 %
Compensation for motor IR drop to improve regulation when using armature voltage feedback as the speed feedback. This is also used in field
weakening applications to improve dynamic response and speed holding stability, refer to “Initial Start-up Routine” in Chapter 4, Item 16.
In armature voltage feedback control at non-zero armature currents, the terminal voltage will be elevated by the amount CURRENT FEEDBACK X
IR COMPENSATION.
ANALOG TACH CAL 23 0.9800 to 1.1000
Trim adjustment of the motor speed to give exactly 100% at the required actual speed value (e.g. 1500 RPM etc). Note: Primary tacho calibration is
achieved by adjusting SW1 - 3 on the tacho calibration board.
ZERO SPD. OFFSET 10 -5.00 to 5.00 %
If the speed feedback is not zero when the motor is stationary (possibly due to hardware offsets etc.) the setting of this parameter to the value of the
offset will result in a zero reading from the speed feedback.
ARMATURE I (A9) 25 UNIPOLAR / BIPOLAR
Selects operation of the current meter output (terminal A9), either bipolar or unipolar.
Bipolar mode : +10V = 200% output current forward, -10V = 200% output current reverse
Unipolar mode : +10V = 200% output current (forward or reverse).
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