Table of Contents
ADJUSTABLE FEATURES
SX TRANSISTOR CONTROLS
FUNCTION 6
PUMP ENABLE SELECT
(Push 6)
If > 250 Activated on normal BDI operation
if < 250 Lock out on pump enable on maintenance speed
limit and BDI operation
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.
Min
Max
Set
0
40
51 to 255
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.
Min
Max
Set
0
40
51 to 255
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.
Min
Max
Set
52
468
0 to 255
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
Per unit value
If set at 71
0.185 amps
3.7 amps
Resolution
Example
Per unit value
If set at 71
0.185 amps
3.7 amps
Resolution
Example
Per unit value
If set at 20
1.63 amps
84.6 amps
Min
Max
Set
0
40
51 to 255
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
SPEED LIMIT 1
(Push 11)
This function allows for the adjustment of the speed limit
(maximum battery volts to the motor) when the SL1 limit
switch input signal is received by the control card. The SL1
limit switch is a normally closed switch connected to
battery negative, the switch opening enables speed limit.
Range
Set
Resolution
Example:
FUNCTION 12
SPEED LIMIT 2
( Push 12 )
Same as Function 11, except using input from the SL2 limit
switch.
FUNCTION 13
SPEED LIMIT 3
(Push 13)
The SL3 speed limit is activated by the Truck Management
Module fault code 93. See Section 6 for Truck
Management Module details.
FUNCTION 14
INTERNAL RESISTANCE
COMPENSATION
( Push 14 )
This function is used when the Battery Discharge Indicator
is present. Adjustment of this function will improve the
accuracy of the BDI. In order to determine this setting, the
voltage drop of the battery under load must first be
calculated by the following method:
1. Record open circuit voltage (Vo) by measuring the
voltage at the control positive and negative power
terminals.
2. Load the traction motor to 100 amps in 1A and record the
voltage (V
) at the control positive and negative power
L
terminals.
3. Calculate voltage drop (V
V
= V
- V
Drop
O
L
Page 61
Resolution
Example
Per unit value
If set at 71
0.185 amps
3.7 amps
100% to 0% of battery volts
51 to 180
0.78% per set unit
Setting of 71 = 84% of battery
volts
) as follows:
Drop
January 1999
Table of Contents
Troubleshooting
