Curtis Instruments AC F4-A User Manual

4 — PROGRAMMABLE PARAMETERS
pg. 67
Return to TOC Curtis AC F4-A Motor Controller – August 2020
APPLICATION SETUP — EM BRAKE CONTROL MENU
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
EM Brake State
EMBrakeState
0x347A 0x00
0 – 4
0 – 4
Read Only EM Brake State:
0 = engaged
1 = releasing
2 = released
3 = engaging
4 = engaged and vehicle stopped
EM Brake Type
EM_Brake_Type
0x3479 0x00
0 – 2
0 – 2
0 [PCF] The brake type parameter determines how the EM brake
responds to the interlock input throttle and vehicle motor speed.
0. EM brake function disabled. Releases the default EM brake
Driver to general I/O use with VCL.
1. EM brake controlled by interlock. The controller will command
the EM brake to release whenever the interlock is closed
(Interlock = On). If interlock braking is enabled and the
interlock opens when the vehicle is moving at motor speed
greater than Zero_Speed_Threshold the controller will
brake the vehicle to a stop (with interlock braking) and then
command the EM brake to set. If the vehicle motor speed
is less than this threshold, the EM brake will engage after
the Sequencing_Delay has expired. If interlock braking is
disabled, the EM brake will engage after the Sequencing_
Delay has expired.
2. EM brake controlled by interlock and neutral. The controller
will command the EM brake to set whenever the throttle
command is zero and motor speed is less than Zero_Speed_
Threshold. Position Hold will be enabled automatically.
Pull In Voltage
EM_Brake_Pull_In_Voltage
0x3473 0x00
0 – 100 %
0 – 32767
0 % The EM brake pull-in voltage allows a high initial voltage when
the EM brake rst turns on to ensure brake release. After 1
second, this peak voltage drops to the EM brake holding voltage.
Note: The Battery Voltage Compensated parameter (0x3470)
controls whether the pull-in and holding voltages are battery
voltage compensated.
Holding Voltage
EM_Brake_Holding_Voltage
0x3472 0x00
0 – 100 %
0 – 32767
0 % The EM brake holding voltage allows a reduced average voltage
to be applied to the brake coil once the brake releases.
Set this parameter (applied voltage) high enough to hold the
brake off during all vehicle shock and vibrations conditions. If the
voltage is too low, the brake can reset when subjected to shock
and vibration conditions.
Note: The EM Brake’s Battery Voltage Compensated parameter
(0x3470) controls whether the pull-in and holding voltages are
battery voltage compensated.
Battery Voltage Compensated
EM_Brake_Battery_Voltage_
Compensated
0x3470 0x00
On/Off
On/Off
On This parameter determines whether the EM brake pull-in and
holding voltages are battery voltage compensated. When set
On, the pull-in and holding voltages are compensated relative to
the Nominal Voltage setting. In other words, the output voltage
is adjusted to compensate for swings in battery voltage so the
percentage is relative to the set Nominal Voltage not to the
actual voltage.
For example, suppose Nominal Voltage setting is 48V and
the Holding Voltage setting is 75% (36V) to the output driver.
Now suppose the bus voltage dips to 40V. If Battery Voltage
Compensated = On, the output will still be 36V to the coil
(Nominal Voltage × Holding Voltage). If Battery Voltage
Compensated = Off, the output will be 30V to the coil
(Actual Voltage × Holding Voltage).

Curtis Instruments AC F4-A Specifications

General

Brand	Curtis Instruments
Model	AC F4-A
Category	Controller
Language	English