Specifications

Curtis PMC 1223/33, 1225/35, 1227/37 Manual
34
3 — PROGRAMMABLE PARAMETERS
DIRECTION [default access: OEM]
The direction input type defines how the controller decides when to
change direction. For wigwag throttles, the direction input type defaults to
respond to the throttle input. For single-ended throttles, this parameter can be
set to either “single” or “dual.” The “single” setting allows the direction to be
chosen via a single switch, which pulls the direction/reverse input (Pin 13) high
when reverse is selected. It is not necessary for the switch to connect Pin 13 to B-
when forward is selected. The “dual” setting requires input from two switches:
one for reverse (Pin 13) and one for forward (Pin 12). In the dual configuration
the switch must pull the forward or reverse input to B+ to select the direction.
Selecting both forward and reverse at the same time will cause the controller to
inhibit the output, disabling the vehicle until only one direction is selected.
These three options—Types “0” through “2” in the Direction programming
menu—are listed in Table 5.
Table 5 PROGRAMMABLE DIRECTION INPUT TYPES
DIRECTION
APPLICABILITY
INPUT
Wigwag Single-Ended
TYPE Throttle Throttle DESCRIPTION
0 ✓ (responds to throttle input)
1 ✓ “single” — allows direction to be
selected via a single switch
2 ✓ “dual” — requires direction to be
selected via inputs from individual
forward and reverse switches