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Set the multiplier (object 2915
the known motor speed.
For example, if it is known that 1000rpm on the motor results in a vehicle speed of 5kph, then
the divisor should be set to 1000, and the multiplier should be set to 0x0050, which is 5kph in
12.4 format.
The same process should be repeated for the user speed ratio, setting the multiplier for the user
speed in the desired custom format. Both the vehicle and user speeds, objects 0x2921 and
0x2922, can be mapped to TPDO for transmission to other devices via CAN if required.
Distance Calculation
Total vehicle distance and trip distance counters are available at objects 0x29A0 and 0x29A1.
Counters will operate and will be accurate provided that the vehicle speed calculated at object
0x2721 is in kph in 12.4 format. Counters are available in the following formats:
Distance travelled in km in 24.8 format
Distance travelled in km in 0.1km/bit increments
Distance travelled in miles in 0.1mile/bit increments
Both distance counters objects can be mapped to TPDOs for monitoring over the CANbus, or for
use by a dashboard display. The trip distance counter can be reset by holding the reset switch,
object 0x217D, closed for 1 second. The total vehicle distance counter cannot be reset by the
user.
Service Indication
The controller can reduce vehicle performance and indicate to the operator when a vehicle
service is required. The interval between services is user-configurable.
Configure the following at object 2850
Service indication: via an analogue (contactor) output (e.g. to drive a dashboard lamp)
and/or Gen4's LED.
Source hours counter: selects the hours counter and is used to determine when a service is
required.
Service interval: hours between vehicle services. Can be used by the reset function (see
below) or for information only.
Next service due: Servicing is required when the source-hours counter reaches this time.
This can be set manually, or automatically using the reset function; see below.
Reset function: write to the reset sub-index at 2850
for the next service. The next service due time is calculated as the source hours counter
time plus the service interval.
Service profile
This is a drivability profile where you can set maximum torques, speeds and acceleration rates
to be applied when a vehicle needs servicing (2925
Traction motor cooling fan
This object can be used to drive a motor cooling fan when the operator is present on the vehicle
(as indicated by the seat switch). The cooling fan object (2421
output.
6-36
sub index 1) to the corresponding scaled vehicle speed for
h
:
h
h
). See 'Driveability profiles' on page 6-26.
h
to automatically reset the service timer
) must be mapped to an analogue
h
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