MT
4.3.3 Park Brakes
4.3.3.1 Park Brake
45
Parameter Possible Values Default Rev HHP Lite Std Adv
Park Brake Single / Dual Dual -,A -
Single – Only parkbrake output M1 is active. Do not use parkbrake output M2.
Dual – Parkbrake output M1 and M2 are both active.
See section
2.4.2: Parkbrake configurations for more information on how to connect
the parkbrakes.
4.3.3.2 Brake / Bridge Off Delay
Parameter Possible Values Default Rev HHP Lite Std Adv
Brake / Bridge Off Delay 100 – 1000 ms 500 ms -,A -
The Power Module uses the motors to brake the powerchair during the time that the
parkbrakes have been de-energised but have not engaged mechanically. This
braking method is called active motor braking.
When the parkbrakes have been de-energised, the Power Module applies active
motor braking for the time defined by the Brake / Bridge Off Delay parameter. After
this time the Power Module will switch off the motors.
The correct value of this parameter is dependent on the mechanics of the parkbrake
that is used on the chair.
Warning:
Make sure that the Brake / Bridge Off Delay value is greater than the
time it takes for the parkbrakes to mechanically engage when they
have been electrically de-energised. The parkbrakes must engage
before the motors turn off, or the powerchair will roll away.
See also section
2.4.5: Parkbrake operation and programming.
4.3.3.3 Test Park Brake Driving
Parameter Possible Values Default Rev HHP Lite Std Adv
Test Park Brake Driving No / Yes Yes A -
Yes – The park brakes are periodically checked for open-circuit while the chair is
driving. Some parkbrakes produce a noise during this test, which can annoy
the user.
No – The park brakes are
not checked for open-circuit while the chair is driving,
only
before the chair starts to drive.
The parkbrake short-circuit test it is not affected by the value of this parameter.
The short-circuit test will still be performed while driving.
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