ADJUSTABLE FEATURES
SX TRANSISTOR CONTROLS Page 34
April 2002
FUNCTION 18 LINE CONTACTOR DROP OUT TIME
DELAY
( Push CONT 3 )
This function allows for the adjustment of the time
allowable for the control to be idle before the line contactor
opens.
Range 0 to 25.5 seconds
Setting 0 to 255
Resolution 0.1 seconds per set unit
Example: Setting of 255 = 25.5 seconds
FUNCTION 19 FIELD CURRENT RAMP RATE DURING
REGEN/PLUGGING
( Push CONT 4 )
This function adjusts the rate at which field current ramps
to full value during regenerative or plug braking.
Range 0 to 0.255 seconds
Setting 0 to 255
Resolution 0.001 seconds per set unit
Example: Setting of 12 = 0.012 seconds
FUNCTION 20 MPH OVER SPEED LIMIT
( Push CONT 5)
This function adjusts the value of the over speed limit of the
control.
Resolution 1 MPH per set unit
Example: Setting of 28 = 28 MPH
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 21 RATE FIELD CHANGES IN OVERSPEED
(Push CONT 6)
This function adjusts how quickly the control responds to
an over speed condition (as defined by the setting value of
function 20). A higher setting will result in the control
requiring a longer response time to an over speed
condition.
Range 0 to 0.255 seconds
Setting 0 to 255
Resolution 0.001 seconds per set unit
Example: Setting of 2 = 0.002 seconds
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 23 ERROR COMPENSATION
(Push CONT 8)
This function is used to reduce the ripple in field current
due to the interaction between motor field design and the
digital field current regulation circuit. The value for this
function should be set to 32.
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 24 FIELD WEAKENING START (or MOTOR
KNEE POINT)
( Push CONT 9)
This function allows for setting the armature current at
which minimum field current will be achieved.
Range 0 to 350 Amps
Setting 0 to 255
Resolution 1.625 per set unit
Example: Setting of 47 = 76.38 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 25 MONITOR
( Push CONT 10)
This function allows the monitoring of certain control
functions by looking directly at the RAM of the
microprocessor. Because absolute memory locations need
to be known, this function should not be used without
detailed instructions from the GE application engineer.
To ensure optimum operation of the control, this function
must be left with zero stored in this register.
FUNCTION 26 RATIO OF FIELD TO ARMATURE AMPS
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