Return to TOC Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
4 — PROGRAMMABLE PARAMETERS
pg. 67
MOTOR: FEEDBACK OPTIONS – FEEDBACK FAULT SETUP
PARAMETER ALLOWABLE RANGE DESCRIPTION
Fault Detection Enable
|Encoder_Fault_Detection_Enable
|Encoder_Fault_Detection_Enable_Bit0 [Bit 0]
0x389C 0x00
On/Off
On/Off
When programmed On, encoder fault checking is enabled. Three fault
conditions are checked: Encoder Fault (fault code 36, Stall Detected
(fault code 73), and Encoder Pulse Error (fault code 88).
Fault Max Speed
Encoder_Fault_Max_Speed
No CAN Object
0 – 2000 RPM
0 – 2000
If the controller transitions from above this speed to below minimum
speed in 8ms an encoder fault will be declared.
Fault Min Speed
Encoder_Fault_Min_Speed
0x308B 0x00
0 – 2000 RPM
0 – 2000
Speed determined to be 0 speed when using a sin/cos feedback
sensor. Has no effect using a quadrature encoder, that value is
calculated based on the speed for a single pulse.
Pulse Fault Detect Time
Encoder_Pulse_Fault_Detect_Time
0x393E 0x00
0.0 – 3.0 S
0 – 94
Denes the minimum time it takes for the controller, while the
vehicle is in motion, to detect that the encoder and the Encoder
Steps parameter do not match. When the Encoder Steps setup is
incorrect, the motor controller cannot properly calculate AC motor eld
orientation. The loss of eld orientation can cause the motor to spin up
toward full speed once any throttle is applied.
This parameter sets a timer that starts once the throttle has been
moved and then released, the drive current is signicant, and the
motor is still accelerating. Note that the motor can spin at high rpm
for several seconds before conditions allow the controller to properly
detect a fault.
An Encoder Pulse Error (fault code 88) is declared when this fault
is detected.
Setting the parameter to zero will disable this fault detection.
Fault Stall Speed
Enc_Fault_Stall_Speed
No CAN Object
0 – 100 RPM
0 – 100
Sets the threshold below which the stall timer may count. If Motor
Speed is less than Fault Stall Speed for Fault Stall Time, a Stall
Detected fault (fault code 73) may be issued.
Fault Stall Time
Enc_Fault_Stall_Time
0x3089 0x00
0 – 10 s
0 – 5000
Sets a timer when no motor encoder movement is detected. In Speed
Modes: If no motor encoder movement is detected for the programmed
Fault Stall Time, a Stall Detected fault (fault code 73) is issued.
In Torque Mode: If no motor encoder movement is detected for the
programmed Fault Stall Time, with maximum throttle applied, a Stall
Detected fault (fault code 73) is issued.