PG DRIVES TECHNOLOGY
63
CHAPTER 3 - PROGRAMMING
SK77898/2
100% corresponds to a resistance of 10KOhm or greater, including an open-circuit,
being connected to pin 1 of Inhibit 3.
0% corresponds to a short-circuit between pins 2 and 3 of Inhibit 3.
Each of the Level Threshold parameters can be set to a value of 0% to 100% in
steps of 1% meaning the range of each band is programmable. This allows for
versatile programming of drive inhibit, speed limit and actuator inhibit conditions
from just one input.
For details of drive inhibit and speed limit programming, refer to section 6.7.
For details of actuator inhibit programming refer to section 6.13
6.7 Inhibit 3 Speed Limit in Band x
This section must be read in conjunction with section 6.5.
There are 4 parameters that can be set:
Inhibit 3 Speed Limit in Band 0
Inhibit 3 Speed Limit in Band 1
Inhibit 3 Speed Limit in Band 2
Inhibit 3 Speed Limit in Band 3
Each is programmable between 0% and 100% in steps of 1%.
The value in each bands parameter sets the wheelchairs maximum driving speed
when the VR2s Inhibit 3 input is in that band.
For example, if Inhibit 3 Speed Limit in Band 3 is set to 0%, then the drive will be fully
inhibited when the connection to Inhibit 3 is of a resistance within the range of Band
3.
For a more detailed example of drive inhibits and speed limits, refer to section
6.15.1.
6.8 Inhibit 3 Operation
This parameter is only relevant if one of the Inhibit 3 Speed Limit in Band x values is
set to 0%, i.e. a drive inhibit. The parameter can be set to Latching or Non-latching.
If set to Latching, then the VR2 must be switched off and on again to resume drive
after an inhibit condition has occurred.
If set to Non-latching, then drive will be possible as soon as the inhibit condition is
removed.
If Inhibit 3 is set to latching, then the TruCharge battery gauge will indicate the
wheelchair is charging when the inhibit is active. See Chapter 1 section 8.3.
6.9 Inhibit 3 Debounce
This parameter sets the amount of time a connection to Inhibit 3 input must be
stable before it is interpreted as a valid condition. This parameter is particularly useful
for switch types that exhibit bounce, such as mercury switches, which are often
used on tilt mechanisms.
The parameter is programmable between 50mS and 500mS in steps 50ms.
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