ADJUSTABLE FEATURES
SX TRANSISTOR CONTROLS
Page 54
October 1998
Min
Max
Set
Resolution
Per unit value
Example
If set at 20
450A 1260A 0 to 250
3.24 amps
515 amps
300A 700A
0 to 250
1.6 amps
332 amps
FUNCTION 7
MIN. FIELD CURRENT
( Push 7 )
This function allows the adjustment of the field weakening
level in order to set the top speed of the motor.
Resolution
Example
Min
Max
Set
Per unit value If set at 71
0
20
51 to 176
0.16 amps
3.2 amps
0
30
51 to 255
0.16 amps
3.2 amps
0
40
51 to 255
0.185 amps
3.7 amps
0
50
51 to 210
0.314 amps
6.28 amps
0
60
51 to 255
0.314 amps
6.28 amps
Important Note: The function is used to optimize motor and
control performance and this setting will be determined by
GE and OEM engineers at the time of vehicle development.
This setting must not be changed by field personnel without
the permission of the OEM.
FUNCTION 8
MAX FIELD CURRENT
( Push 8 )
This function allows for the adjustment of the maximum
field current in order to obtain the maximum torque of the
motor.
Resolution
Example
Min
Max
Set
Per unit value If set at 71
0
20
51 to 176
0.16 amps
3.2 amps
0
30
51 to 255
0.16 amps
3.2 amps
0
40
51 to 255
0.185 amps
3.7 amps
0
50
51 to 210
0.314 amps
6.28 amps
0
60
51 to 255
0.314 amps
6.28 amps
Important Note: The function is used to optimize motor and
control performance and this setting will be determined by
GE and OEM engineers at the time of vehicle development.
This setting must not be changed by field personnel without
the permission of the OEM.
FUNCTION 9
REGEN BRAKING CURRENT LIMIT
(Push
9)
This function allows for the adjustment of the regen braking
current limit.
Resolution
Example
Min
Max
Set
Per unit value If set at 20
32
240
0 to 255
0.93 amps
50.6 amps
52
468
0 to 255
1.63 amps
84.6 amps
184
600
0 to 255
1.63 amps
216.6 amps
FUNCTION 10
MAX FIELD CURRENT FOR REGEN
( Push 10 )
This function allows for the adjustment of the maximum
field current to be used during the regen braking mode.
Resolution
Example
Min
Max
Set
Per unit value If set at 71
0
20
51 to 176
0.16 amps
3.2 amps
0
30
51 to 255
0.16 amps
3.2 amps
0
40
51 to 255
0.185 amps
3.7 amps
0
50
51 to 210
0.314 amps
6.28 amps
0
60
51 to 255
0.314 amps
6.28 amps
Important Note: The function is used to optimize motor and
control performance and this setting will be determined by
GE and OEM engineers at the time of vehicle development.
This setting must not be changed by field personnel without
the permission of the OEM.
FUNCTION 11
TURN POT SPEED LIMIT
(Push
11)
This function allows for the adjustment of the speed limit
(maximum battery volts to the motor) when the turn
potentiometer voltage is greater than 2.74 volts or less than
1.54 volts.
Range
100% to 0% of battery volts
Set
51 to 180
Resolution
0.78% per set unit
Example:
Setting of 71 = 84% of battery
volts
FUNCTION 12
SPEED LIMIT 2
( Push 12 )
This function is operates in the same way as Function 11,
except that it is activated when the turn potentiometer
voltage is greater than 3.08 volts or less than 1.2 volts.
FUNCTION 13
SPEED LIMIT 3
(Push 13)
The SL3 speed limit is activated by the Truck Management
Module fault code 93. See Section 5 for Truck
Management Module details.