Rockwell Automation 150 SMC Dialog Plus Controller - Quick Start - Manual (Page 15)

Rockwell Automation Publication 150-QS002B-EN-P - October 2011 15
Quick Start
Notes:
1. If you plan to use the Bulletin 825 converter module for current feedback
to the SMC Dialog Plus controller, this calibration procedure is not
necessary.
2. An unbalanced three-phase system may affect the accuracy of the
calibration.
3. It is recommended that Parameter #36, Overload Class, is programmed to
OFF during the calibration procedure.
Calibration requires the motor to be operated at full speed. Additionally, the
motor must be connected to its load in order that the motor draw as near to its
full load current (FLC) rating as possible. This is necessary so that maximum
accuracy is achieved for current measurements at overload trip levels.
➊The currents should measure a minimum of 70% of the motor’s full load current rating in order to achieve the best
results in accuracy.
Description Action Display
1. Check all power and control wiring connections to the
controller and motor. Apply a start command to the
controller and check for motor rotation to full speed.
_
2. Using the clamp-on ammeter, measure the three-phase
motor currents. Place the ammeter around the phase
with the largest current draw.
➊
_
3. In the Calibrate group, scroll to the Calibration
parameter.
4. Monitor the clamp-on ammeter and verify that the motor
current is stable. Press the Select key. Toggle the
Up/Down keys to the Activate setting. Press the Enter
key to accept. Monitor the ammeter display for the next
2 seconds and record the average value. During this time
period, the SMC Dialog Plus controller samples motor
response data.
5. Access the next parameter using the Up key.
6. Press the Select key. Enter the clamp-on meter value
monitored in step 4. Press the Enter key to accept. The
SMC Dialog Plus controller is now calibrated.
AT SPEED
##.# AMPS
AT SPEED
##.# AMPS
CALIBRATION
OFF
SEL CALIBRATION
ACTIVATE
ENTER CALIB. AMPS
0.0 AMPS
SEL
ENTER CALIB. AMPS
##.# AMPS