Curtis 1239E - MOTOR MENU

Return to TOC Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
4 — PROGRAMMABLE PARAMETERS
pg. 53
EM BRAKE CONTROL MENU, cont’d
PARAMETER ALLOWABLE
RANGE
DESCRIPTION
Position Hold Settling Time
Position_Hold_Settling_Time
0x3024 0x00
0 – 5000 ms
0 – 156
Determines how long the position hold function is allowed to operate
before the EM brake is set. This time should be set long enough for
the position hold to settle.
This parameter appears twice in the menu structure. Changing the
value of this parameter affects this (same) parameter in the Position
Hold menu.
NOTE *
Brake Set Time
EM_Brake_Set_Time
0x30DB 0x00
40 – 2000 ms
5 – 250
Estimated time for the EM brake to physically set after the holding
voltage is released. This determines how long the controller waits,
after removing voltage from the brake, before released the torque.
This should be set longer than the actual brake setting time to
ensure the vehicle doesn’t move before the brake fully engages.
Torque Release Time
EM_Brake_Torque_Release_Time
0x30DC 0x00
40 – 2000 ms
5 – 250
Time to release torque after EM Brake has set and motor has
stopped (EMBrakeEngagedAndStopped state).
Brake Release Time
EM_Brake_Release_Time
0x3073 0x00
40 – 2000 ms
5 – 250
Estimated time for the EM brake to physically release after the pull-
in voltage is applied. This is used to ensure the position hold torque
buildup is complete before the brake releases. When set too low, the
vehicle may experience rollback on EM brake release.
Torque Preload Time
EM_Brake_Torque_Preload_Time
0x3090 0x00
0 – 800 ms
0 – 100
Estimated worst-case time to build up the torque required to hold
the vehicle stationary on a hill prior to EM brake release.
This is used in conjunction with Release Delay to determine when to
release the brake and allow the speed request to slew away from zero.
NOTE *
Torque Preload Enable
|EM_Brake_Torque_Preload_Enable
|EM_Brake_Torque_Preload_Enable_Bit0 [Bit 0]
0x389D 0x00
On / Off
On / Off
When enabled, this function eliminates rollback when the throttle is
re-engaged on a ramp by forcing the vehicle to rst enter position-
hold before setting the EM brake, and then “remembering” the
amount of torque that was necessary to hold it on the ramp. When
throttle is re-engaged, this value is loaded in the motor before the
EM brake is released. The torque value is cleared automatically
when KSI power is cycled.
Off = When a valid throttle input is received, the speed controller will
start with no torque preload as soon as the Release Delay expires.
This will allow some rollback when the EM brake releases. This
rollback can be reduced by raising the Exit Rollback Reduction
parameter in the Position Hold Menu.
On = When a valid throttle input is received, the speed controller will
start with a pre-set torque as measured by position-hold when
the vehicle came to a stop.
NOTE *
Save Torque Preload
|Save_Torque_Preload
|Save_Torque_Preload_Bit0 [Bit 0]
0x38C9 0x00
On/Off
On/Off
This parameter controls whether the EM Brake torque preload is
saved over a keyswitch cycle. If Torque_Preload_Cancel_Delay
is nonzero and this parameter = On, the timer starts again upon
startup (KSI cycle) such that the countdown is from the full value of
the Torque_Preload_Cancel_Delay parameter.
Torque Preload Cancel Delay
EM_Brake_Torque_Preload_ Cancel_Delay
0x3091 0x00
0 – 120 s
0 – 15000
This timer starts after the EM brake is set. If this timer expires
before the throttle is re-engaged, the torque preload memory will
be cleared. Setting this parameter to zero disables the timer, i.e.,
the torque preload is never cancelled. The purpose of this delay is
to prevent the vehicle from lunging forward if it is unloaded on a hill
such that the torque measured by position-hold is no longer valid.
NOTE: This parameter is applicable only when Torque Preload Enable
= On, and the torque value is saved over key cycles when Save
Torque Preload = On. (see these parameters and conditions, above).
EM Brake Fault Motor Revs
EM_Brake_Fault_Motor_Revs
0x3894 0x00
1.0 – 20.0
10 – 200
Denes the allowable number of motor revolutions after the EM
brake is set before an EM Brake Failed to Set fault is issued (fault
code 92).
NOTE: *This parameter is applicable only when Speed Mode or Speed Mode Express is selected and either Position Hold Enable = On or EM Brake Type = 2.
Quick Link:
Position Hold
menu p.41