4 — PROGRAMMABLE PARAMETERS
Curtis AC F4-A Motor Controller – August 2020 Return to TOC
pg. 48
APPLICATION SETUP — THROTTLE MENU
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
Throttle Input
Throttle_Pot_Percent
0x3360 0x00
0.0 – 100.0 %
0 – 1000
Read Only Normalized percentage of the throttle input (pin 16 basis).
Note, this monitor variable appears in the System Monitor » Inputs
» menu as per the throttle setup. It also appears as the Percent
variable in the Controller Setup » Inputs » Analog 1 menu when
the Analog 1 Type is set to Voltage.
Throttle Command
Throttle_Command
0x335D 0x00
–100.0 – 100.0 %
–32767 – 32767
Read Only Throttle request to the slew rate block of the motor control.
See Figure 11, Throttle Signal Processing.
Throttle Multiplier
Throttle_Multiplier
0x335F 0x00
–200 – 200 %
–256 – 256
+100 % Multiplies the throttle signal, which is useful in VCL throttle
processing.
See Figure 11, Throttle Signal Processing.
Mapped Throttle
Mapped_Throttle
0x3352 0x00
–100.0 – 100.0 %
–32767 – 32767
Read Only Mapped throttle request.
See Figure 11, Throttle Signal Processing.
Direction Source
Direction_Source
0x3345 0x00
Fwd/Rev
Wig/Wag
——————
0 – Fwd/Rev
1 – Wig/Wag
Fwd/Rev
[PCF]
Congures how throttle direction is determined.
0. Fwd/Rev Switch. Requires a dedicated forward or reverse
input to turn the motor in the assigned direction. Asserting both
inputs at the same time results in a HPD Sequencing fault.
1. Based on the throttle mapping (Wig Wag). Here, the neutral
point must be set up somewhere in the center of the
throttle throw, with increasing voltage beyond this point
providing increasing forward command and voltages below
this point providing increasing reverse command. Wigwag
throttles are only applicable to 0–5V voltage and 3-wire
potentiometer throttles.
Forward Min Input
Forward_Deadband_Percent
0x3349 0x00
0 – 100 %
0 – 1000
15 % Denes the 2- or 3-wire wiper or the voltage-throttle percentage
at the minimum-throttle threshold for the forward direction
(positive motor rpm). Increasing this parameter will increase the
neutral range (deadband). This parameter is especially useful with
throttle assemblies that do not reliably return to a well-dened
neutral point because it allows the “deadband” to be dened
wide enough to ensure that the controller goes into neutral
when the throttle mechanism is released. See Figure 10, Throttle
Adjustments Diagram, below.
Forward Max Input
Forward_Max_Percent
0x334B 0x00
0 – 100 %
0 – 1000
85 % Denes the 2- or 3-wire wiper or voltage-throttle percentage
required to produce 100% controller output. Decreasing this
parameter value reduces the voltage necessary to produce
full-throttle controller output. This parameter accommodates
reduced-range throttle assemblies.
See Figure 10, Throttle Adjustments Diagram, below.
Forward Map Shape
Forward_Map
0x334A 0x00
0 – 100 %
0 – 32767
35 % Modies the vehicle’s response to the throttle input. Setting this
parameter to 50% provides a linear output response to throttle
position. Values below 50% reduce the controller output at low
throttle settings, providing enhanced slow speed maneuverability.
Values above 50% give the vehicle a faster, more responsive
feel at low throttle settings. See Figure 10, Throttle Adjustments
Diagram, below.
The map value is the percentage of controller output at half
throttle [(Min Input + Max Input)/2].
Reverse Min Input
Reverse_Deadband_Percent
0x3358 0x00
0 – 100 %
0 – 1000
15 % The same as the Forward Min Input parameter counterpart and
applies when throttle direction is reversed (negative motor rpm).
See Figure 10, Throttle Adjustments Diagram, below.
Reverse Max Percent
Reverse_Max_Percent
0x335A 0x00
0 – 100 %
0 – 1000
85 % The same as the Forward Max Input parameter counterpart and
applies when throttle direction is reversed (negative motor rpm).
See Figure 10, Throttle Adjustments Diagram, below.
Quick Links:
Fig. 10 p.50
Fig. 11 p.52
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