3 — PROGRAMMABLE PARAMETERS
pg. 23
Return to TOC 1212 & 1212P Manual - Sep 2019
MOTOR MENU
PARAMETER ALLOWABLE RANGE DESCRIPTION
System Resistance 0–800 mΩ Sets the system resistance (motor + brushes + wiring + connections) used
for load compensation and speed estimation. Control system performance
depends on this parameter being set correctly; it must be set to the actual
cold motor resistance.
For instructions, see initial setup procedure 4, on page 28.
Resistance Auto Comp On/Off Resistance is automatically measured under a preset low current before the
brake is released. The measured motor resistance plays an important role in
IR compensation.
The Resistance Auto Comp parameter enables/disables this automatic
function.
Auto Comp Current Limit 5–50 % Sets the current limit used for automatic resistance testing, as a percentage
of the Main Current Limit (see Current menu).
Speed Scaler 20–27 V The Speed Scaler parameter sets the maximum voltage that can be applied
to the motor. It can be used to eliminate variations in maximum speed
that would otherwise result when driving with a fully charged battery vs. a
partially discharged battery. If Speed Scaler is set to 23 volts, for example, the
maximum vehicle speed will be the same whether the actual battery voltage
is 27 volts or 23 volts or any value in between.
Current Rating model dependent This parameter should be set to the current rating provided by the motor
manufacturer.
For 1212-22xx controllers, it is adjustable from 0 to 45 amperes.
For 1212-24xx controllers, it is adjustable from 0 to 70 amperes.
For 1212P-25xx controllers, it is adjustable from 0 to 35 amperes.
Max Current Time 0–120 s Sets the maximum amount of time the motor is allowed to run at the main
current limit.
Cutback Gain 0–100 % When the motor overheats, the drive current is cut back until it reaches the
programmed Current Rating. The Cutback Gain determines how quickly this
cutback will occur, once the programmed Max Current Time has expired.
STALL MENU
PARAMETER ALLOWABLE RANGE DESCRIPTION
Stall Speed 0–255 1212 only. Sets the Stall Speed that will be used to determine a Motor Stalled
fault.
A Motor Stalled fault is issued when the estimated speed < Stall Speed and
the duty cycle is < Stall PWM for longer than Stall Timeout.
Stall PWM 0–100 % 1212 only. Sets the Stall PWM that will be used to determine a Motor Stalled
fault; see description in Stall Speed parameter description.
Stall Timeout 16–32 s 1212 only. Sets the Stall Timeout that will be used to determine a Motor
Stalled fault; see description in Stall Speed parameter description.
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