Wesley BCT-6200-6SA - Manual (Page 48)

Curtis 1243
GEN
2 Manual, Rev. B 40
FIELD CHECK
The field check parameter determines whether the field diagnostics will be active.
When programmed On, the controller checks for field open and field shorted
faults. This parameter is typically programmed On except in series motor ap-
plications, or where the motor resistance is too high to provide valid fault data.
MAIN CONT INTR
The main contactor interlock parameter allows the OEM to define a dual
switch requirement to operate the vehicle. When this parameter is programmed
On, the controller requires that both KSI (Pin 16) and the interlock input
(Pin 15) be pulled high (to B+) before the controller will engage the main
contactor. The main contactor will open after the interlock switch is opened
and the sequencing delay expires. If this parameter is programmed Off, only
the KSI input is required for the main contactor to be engaged.
After changing the main contactor interlock setting, KSI must be cycled
for the new setting to take effect.
MAIN OPEN DLY
The main contactor open delay parameter is applicable only if the main contactor
driver interlock has been programmed On. The delay can then be set to allow
the contactor to remain engaged for a period of time after the interlock switch is
opened. The delay is useful for preventing unnecessary cycling of the contactor
and for maintaining power to auxiliary functions, such as a steering pump motor,
that may be used for a short time after the interlock switch has opened. The
main contactor open delay is programmable from 0 to 40 seconds.
After the interlock switch is opened, the programmed sequencing delay
must expire before the main contactor open delay timer starts counting. There-
fore, the time between the interlock switch opening and the main contactor
disengaging is the sum of the sequencing delay and the main contactor open
delay (see Figure 14, page 29.)
CONT DIAG
The main contactor diagnostics parameter, when programmed On, enables two
checks to verify that the main contactor is present and that it has not welded
closed. Each time the main contactor is commanded to engage, the controller
first performs a main contactor welded test to verify that it is not already closed.
The controller then engages the contactor and performs a missing contactor
test to confirm that the contactor successfully engaged.
These checks are not performed if the main contactor diagnostics parameter
is programmed Off. The main contactor driver, however, is always protected
from overcurrents, short circuits, and overheating.
3 — PROGRAMMABLE PARAMETERS: Main Contactor Parameters
Main Contactor Parameters