Kohler Curtis F Series User Manual

4 — PROGRAMMABLE PARAMETERS
Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022 Return to TOC
pg. 134
MOTOR SETUP/INDUCTION MOTOR (ACIM) — LIMITED OPERATING STRATEGY (LOS) MENU
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
LOS Upon Encoder Fault
LOS_Upon_Encoder_Fault
0x3630 0x00
On/Off
On/Off
On
(1)
The Limited Operating Strategy (LOS) is typically to drive the
vehicle back to a repair center at very low speeds in the event the
motor encoder fails.
Following an encoder failure (either Encoder Fault (fault code 36)
or Stall Detected (fault code 73)) and after the Interlock is cycled
the vehicle enters LOS mode, thus allowing drive without motor
encoder feedback.
In LOS mode, the ability to achieve maximum torque even for a
very short time is considered more important than smoothness.
When LOS mode is entered the Encoder LOS fault (fault code 9-3)
becomes active and the encoder fault (either Encoder Fault (fault
code 3-6) or Stall Detected (fault code 7-3)) is cleared.
When this parameter setting is On, the LOS mode is entered in
the event of an encoder fault followed by an Interlock cycle.
When programmed Off in the event of an encoder fault the
encoder fault remains and drive is disabled.
LOS Max Speed
Enc_LOS_Max_Speed
0x362A 0x00
100 – 24000 rpm
100 – 24000
800 rpm This parameter indirectly denes the maximum speed for LOS
mode by setting the maximum frequency that corresponds
to LOS Max Speed. In LOS mode the throttle commands a
frequency that is interpolated linearly between zero (at Throttle
Command = 0%) and the programmed LOS Max Speed (at
Throttle Command = 100%).
LOS Max Current
Enc_LOS_Max_Current
0x3626 0x00
100 – 650A
1000 – 6500
400A In LOS mode, a partial or full throttle command will result in the
maximum current set by this parameter. The controller's rated
current clamps this parameter’s value.
LOS Max Mod Depth
Enc_LOS_Max_Mod_Depth
0x3628 0x00
15 – 100 %
177 – 1182
50 % In LOS mode, the maximum modulation depth acts to limit
the current at higher speeds. Set this parameter such that the
modulation depth limit is reached prior to the LOS Max Speed
limit so that the motor current will fall off from LOS Max
Current at higher speeds. This may allow the vehicle to drive
longer in LOS mode as it lessens the chance of the motor or
controller overheating.
LOS Accel Rate
Enc_LOS_Accel_Rate
0x3620 0x00
2.0 – 15.0 s
2000 – 15000
7.0 sec Denes the rate (in seconds/Typical Max Speed) at which the
frequency increases when full throttle is applied while operating
in LOS mode. This parameter should be set to a slow rate (high
parameter value) so the frequency command has a very slow
slew rate to ensure that the max torque point is hit for a reason-
able period of time; this decreases the probability of going over
the slip curve and allows ramps or obstacles to be overcome.
LOS Decel Rate
Enc_LOS_Decel_Rate
0x3624 0x00
2.0 – 15.0 s
2000 – 15000
3.0 sec Denes the rate (in seconds/Typical Max Speed) at which the
frequency decreases when throttle is released while operating in
LOS mode.

Kohler Curtis F Series Specifications

General

Brand	Kohler
Model	Curtis F Series
Category	Controller
Language	English