R&M Materials Handling VARIABLE SPEED CONTROLS CMXC 022 Service Manual - Manual (Page 14)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
14/14 R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
n p R I
S NOM
* * rate - IR
∗ =
I
NOM
Nominal current of the motor (one motor)
R
s
Stator resistance, measured between inverter
terminals X2:4-5
P Number of polepairs
N Number of motors connected to inverter
Settings:
IR-rate Setting of S4
90 - S4-3 = 0 ; S4-4 = 0
60 - 89 S4-3 = 1 ; S4-4 = 0
40 - 59 S4-3 = 0 ; S4-4 = 1
- 37 S4-3 = 1 ; S4-4 = 1
m
For conical brake motors it is recommended to set the IR-compensation one step higher than the IR-rate indicates.
The reliable operation of the brake must be verified during start-up.
3.6.3 Motor nominal current
Motor nominal current is set by switches S5-1 and S5-2 as follows:
Check the nominal current of the motor from the rating plate
Calculate the total current by multiplying the current by the number of the motors
Select the settings according to the table below
I
NOM,TOTAL
S5-1 S5-2
0…1.8A 0 0
1.9A…2.7A 1 0
2.8A…3.5A 0 1
>3.5A 1 1
For example: there are two 1.5A motors
⇒ Setting is S5-1=0 and S5-2=1.