American Control Electronics MGB400 - Startup and Configuration; Jumper Settings; Startup Procedure; Status Indicators and Calibration

QSG-0123 rev 4
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Verify that no foreign conducve material is present on the printed circuit board.
- Ensure that all jumpers are properly set.
1. Turn the speed adjust potenometer full counterclockwise (CCW).
2. Apply AC line voltage.
3. Make sure the drive is enabled / not inhibited.
4. Slowly advance the speed adjust potenometer clockwise (CW) or increase the analog voltage signal.
4.
The motor slowly accelerates as the potenometer is turned CW or as the analog voltage signal is
4.
increased. Connue unl the desired speed is reached.
5. Remove AC line voltage from the drive to coast the motor to a stop.
STARTUP
Jumper 1: Motor Voltage
OPEN / NO JUMPER - Leave these pins open if using a 180 VDC motor.
CLOSED / JUMPER - Place a jumper on these pins if using a 90 VDC motor.
Jumper 2:
Speed or Torque Mode
OPEN / NO JUMPER - Speed Mode: The drive will do whatever current is necessary (up to the
OPEN / NO JUMPER -
torque/current limit set by the CL trim pot) to achieve and maintain the
OPEN / NO JUMPER -
commanded speed/voltage.
CLOSED / JUMPER - Torque Mode: The drive will do whatever voltage is necessary (up to the
CLOSED / JUMPER -
speed/voltage limit set by the MX SPD trim pot) to achieve and maintain
CLOSED / JUMPER -
the commanded current/torque.
Jumper 3: AX2 Terminal (Inhibit / Enable)
OPEN / NO JUMPER - Inhibit. The motor will regeneravely brake when told to stop using the
OPEN / NO JUMPER -
AX2 terminal.
CLOSED / JUMPER - Enable. The motor will coast when told to stop using the AX2 terminal.
Jumper 4: Invert AX2 (Inhibit / Enable)
OPEN / NO JUMPER - Normal (Open to run / Close to stop).
CLOSED / JUMPER - Invert (Close to run / Open to stop).
Jumper 5: Current Limit Scale
OPEN / NO JUMPER - 10 A current limit scale. Leave these pins open if using a motor larger than
OPEN / NO JUMPER -
2.5 amps.
CLOSED / JUMPER - 2.5 A current limit scale. Place a jumper on these pins if using a motor
CLOSED / JUMPER -
smaller than 2.5 amps.
Jumpers 1, 2, and 5 may only be set while the drive is powered off or disabled.
JUMPERS
Startup
STATUS
LED
LIMIT
LED
STATUS LED (Green)
Solid: AC line voltage is applied to the drive and the drive is enabled to run.
1 Flash: The drive is disabled or inhibited.
2 Flashes: Either Jumper 1, 2, or 5 was changed during operaon. To change these sengs, the drive
must either be disabled or powered off.
LIMIT LED (Red)
Solid: The drive is in current limit. This means the motor is asking for more current (torque) than the
drive is set to allow out. Either reduce the amount of torque required by the motor or raise the current
limit output of the drive using the Torque (CL) trim pot.
LEDs
Offset (OFFST): The OFFST seng determines the minimum motor speed when the speed adjust
potenometer or analog voltage signal is set for minimum speed. To calibrate the OFFST:
1. Set the OFFST trim pot full CCW.
2. Set the speed adjust potenometer or analog voltage signal for minimum speed.
3. Adjust OFFST trim pot unl the desired minimum speed is reached.
Maximum Speed (MX SPD): The MX SPD seng determines the maximum motor speed when the
speed adjust potenometer is set for maximum speed. To calibrate the MX SPD:
1. Set the MX SPD trim pot full CCW.
2. Set the speed adjust potenometer for maximum speed.
3. Adjust MX SPD trim pot unl the desired maximum speed is reached.
Torque (CL): The CL seng determines the maximum torque for accelerang, driving, and decelerang
the motor in both the forward and reverse direcons.
To calibrate CL:
1. With the power disconnected from the drive, connect a DC ammeter in series with the
1. armature.
2. Set the CL trim pot to minimum (full CCW).
3. Set the speed adjust potenometer to maximum forward speed (full CW).
4. Carefully lock the motor armature. Be sure that the motor is firmly mounted.
5. Apply line power. The motor should be stopped.
6. Slowly adjust the CL trim pot CW unl the armature current is 150% of motor rated
6. armature current.
7. Turn the speed adjust potenometer to minimum speed (full CCW).
8. Remove line power.
9. Remove the stall from the motor.
10. Remove the ammeter in series with the motor armature if it is no longer needed.
IR Compensaon (IR): The IR seng determines the degree to which motor speed is held constant as
the motor load changes. To calibrate the IR:
1. Set the IR trim pot full CCW.
2. Increase the speed adjust potenometer unl the motor runs at midspeed without load. A
2. handheld tachometer may be used to measure motor speed.
3. Load the motor armature to its full load armature current rang. The motor should slow down.
4. While keeping the load on the motor, rotate the IR trim pot unl the motor runs at the
4. speed measured in step 2. If the motor oscillates (overcompensaon), the IR trim pot
4. may be set too high (CW). Turn the IR trim pot CCW to stabilize the motor.
5. Unload the motor.
Calibration
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