3 — PROGRAMMABLE PARAMETERS
Curtis Model 1226 – September 2019
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pg. 36
INTERLOCK BRAKING MENU
PARAMETER VALUES DEFAULT DESCRIPTION
Interlock Type [PCF] 0-1 0 Species whether interlock braking is turned on with the
keyswitch or the interlock input:
0 = Interlock input
1 = Keyswitch
Decel Rate 0.1-8.0s 1.0s Sets the rate, in seconds, at which the vehicle decelerates when
the interlock is released. Larger values represent slower response
times.
Interlock Brake Timeout 0.2-8.0s 2.0s Sets the maximum allowable duration of an interlock braking event.
The timer starts when the interlock input’s state changes to off.
If the time expires before the vehicle has stopped, the controller
engages the EM brake.
This timeout allows parallel usage of regen braking and the EM
brake to reduce stopping distance. If the timeout expires and the
motor is still moving, regen braking will continue to slow vehicle
motion in conjunction with the EM brake.
Understanding the HPD/SRO Function
e HPD/SRO safety function protects users from unexpected starts when the interlock input
changes from o to on. If the HPD/SRO parameter is enabled and one of the conditions described
in Table 26 occurs, the controller generates an HPD/Sequencing Fault.
Table 26 HPD and SRO
Abbreviation Name Condition
HPD High Pedal Disable The throttle input is greater than 25% when the interlock input
changes to on.
SRO Static Return to Off A direction input is on when the interlock input changes to on
To clear an HPD/Sequencing Fault, perform the following steps:
1. Turn o the direction switches.
2. Set the throttle so that it is under 25% of its maximum voltage.
Interlock Braking Menu
e following table describes the interlock braking parameters.
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