82
PG DRIVES TECHNOLOGY
17
SP1B - P
ROGRAMMING
SK73750/7
6 Tips on Programming
PGDT controllers have a large number of programmable parameters which can be
used to optimize the driving performance of almost any vehicle. Many of these factors
are dependent on one another, which means that if you change one factor to achieve
a certain performance characteristic then other factors may also need to be adjusted.
Therefore, to minimize the number of iterations whilst programming, it is helpful to
follow a logical programming sequence. This is described below.
1 Refer to section 5.2 and set the desired level of COMPENSATION. If you don’t
know the armature resistance of the motor, then it is possible to set the
compensation level empirically. To do this:
• Set the vehicle to drive at 30% speed and approach a gradient.
• If the level of compensation is correct, the vehicle will drive up the gradient
at the same speed as it drove on the level.
• If the level of compensation is too low, the vehicle will slow down as it drives
onto the gradient.
• If the level of compensation is too high, the vehicle will try and drive faster up
the gradient.
If this method is used rather than using motor manufacturer’s
figures, then to allow for the effects of temperature, the
compensation level should be confirmed by performing the
test again when the motor and controller have fully cooled.
2 Refer to section 5.3 and set the desired level of HOLD FACTOR.
• If the level of hold factor is correct, the vehicle should only roll-back very
slightly before the solenoid brake is applied.
• If the level is too low, the vehicle will roll-back excessively before the solenoid
brake is applied.
• If the level is too high, the vehicle may start to drive back up the gradient
before the solenoid brake is applied.
As with the previous section, this setting should be confirmed
by performing the test again when the motor and controller
have fully cooled.
3 To further optimize the vehicle’s roll-back performance, refer to section 5.5
and set the BRAKE TIME.
4 Refer to sections 4.1 to 4.6 to set the desired driving speeds and
accelerations for the vehicle.
5 Perform the gradient tests once more to ensure the performance is still as
required.
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