Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 262)

Chapter 8
Start–Up
8-18
6. Verify correct scaling of Armature voltage feedback. Measure the
armature voltage at A1 and A2 output connections of the Drive. Verify
that the voltage measured is the same as the value shown in Parm 105
(Arm Voltage Fdbk).
If the value of Parm 105 is incorrect, change the value of Parm 739 (K
ARM Volts) until the measured voltage agrees with Parm 105.
Increasing Parm 739 increases Parm 105.
7. Verify correct scaling of speed feedback. Measure the actual motor
speed at the motor shaft. Verify that the value measured at the shaft is
the same as Parm 106 (Velocity Fdbk).
If actual speed measured at the shaft doesn’t match the value of Parm
106:
a. For encoder feedback, verify that both Parm 606 and 609 are
properly entered.
b. For tachometer feedback, verify that the scaling parameters
associated with the analog input from the Discrete Adapter Board
for the tachometer feedback are properly scaled. Scaling should be
set so that at base speed, the value at Parm 156 is base speed (4096
in drive units)
8. Verify correct scaling of Armature current feedback. Measure the
armature current at the A1 or A2 output connections of the Drive.
Verify that the current measured is equal to the value shown in Parm
112 (Arm Current Fdbk).
If value is incorrect, verify that the value of Parm 611 (Motor Arm
FLA) and Parm 615 (Rated Arm Brdg I) is correct.
!
ATTENTION: Failure to verify correct scaling of field current
feedback may result in motor damage.
9. Verify correct scaling of field current feedback. Measure the field
current by placing a clamp-on-ammeter at F+. Verify that the current
measured is equal to the value shown in Parm 118 (Fld Current
Feedback).
If value is incorrect, verify that the value of Parm 612 (Rate Fld Mtr
Cur) and Parm 616 (Rated Fld Brdg I) is correct.
10. Stop Drive.
11. Reset Values of 607, 608, 663 and 664 to their original values.