AutomationDirect IRON HORSE GSD5-240-10C Manuel de l'utilisateur - Page 13

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Trim Pot Adjustments (continued)

For GSD5-240-10C with optional GSDA-AI-A Analog Current Input Card, and GSD5-240-10N4-A

(Adjustments are performed with motor connected to drive.)

1) Adjust the DC drive Min trim pot to minimum (full CCW) and Max trim pot to 50% (The voltage is

set below the typical motor voltage to make certain the drive is NOT in saturation before setting the

analog current input board saturation point

2) Set the Linearity/gain pot on the analog current input full CW This is a 20-turn pot and you should

hear a clicking with each turn when fully up or just count 20 turns

3) Make certain your motor is connected to +/-ARM output of the drive, the AUTO/MAN switch is in

AUTO mode (for GSD5-240-10N4-A), and source power for the drive is turned on (Note: For proper

tuning, this setup is best done on an unloaded motor)

4) With power applied and a voltmeter monitoring motor output VDC, apply 4mA to analog current

input board Check voltmeter reading and adjust the Linearity/gain trim pot, R16, on the analog

current input board CCW until motor output voltage is less than 01VDC

5) Now apply 20mA to the analog current input board and adjust the Max trim pot to a voltage that

is 15 volts above the final desired max motor voltage output Adjust the Linearity/gain trim pot on

the analog current input board CCW until the motor output voltage decreases to the desired max

voltage setpoint

6) Now, apply 4mA to the analog current input board again, and adjust the Min trim pot to deadband

or the desired minimum motor voltage output The deadband point is where you are at 0VDC, and

any further increase of the Min trim pot would result in an output to the motor Re-apply 20mA to

the analog current input board and verify max output has not changed A small adjustment may be

needed to the Max trim pot to reset to desired max output

7) Adjust 4-20 input to 12mA If tuned properly the output voltage of an unloaded motor should be

within a few volts of ½ output (based on max output setting above)

8) GSD5-240-10N4-A option only: With 20mA applied to the GSD5-240-10N4-A in Auto mode,

move AUTO/MANUAL switch to MANUAL

In manual mode, turn the speed pot full CW and note motor voltage output reading on voltmeter

If not equal to output at 20mA in Auto Mode, adjust the Balance trim pot on the GSD5-240-10N4-A

board (CW or CCW) until the same reading is achieved The motor output VDC should not change

more than 1VDC when flipping back and forth between AUTO and MANUAL position

FOR GSD5-240-10N4-V

(Adjustments are performed with motor connected to drive.)

1) With NO power at the drive, connect a DC voltmeter (meter must not be grounded) to control

outputs as follows: Meter COMMON to the -ARM terminal; Meter POSITIVE to the +ARM terminal

Select correct meter range (0-90V or 0-180V)

2) Preset GAIN trim pot (analog voltage follower board) fully CCW, place input voltage range jumper

clip in proper position (For ranges, refer to the GSD5-240-10N4-V Basic Wiring Diagram on page

3) Preset control as follows: MIN and IR COMP fully CCW; MAX at 50%

4) Apply desired AC voltage to drive and analog voltage follower board

5) With 0 volts into analog voltage follower board, adjust MIN trim pot on drive to eliminate

deadband To do this, increase MIN fully CW, and then adjust CCW until meter reads 0V

6) Apply maximum input voltage to analog voltage follower board input

7) Adjust GAIN until no further change in voltage output occurs, then turn CCW until a 5V drop occurs,

and then set control MAX to 90VDC (for 120V input) or 180VDC (for 240V input)

8) For Closed Loop systems the IR COMP should remain fully CCW For Open Loop systems, set IR per

set-up procedure

9) Some interaction between trimpots may occur Recheck the MIN trim pot setting and repeat steps 5

through 7 as needed

IronHorse GSD5 DC Drives User Manual – 1st Ed, Rev E – 05/13/2020

Page 13