C
L E A R
P
A T H
M C / S D
U
S E R
M
A N U A L
R
E V
.
3 . 0 9
4 9
T
EKNIC
,
I
NC
. T
EL
.
(585)
784-7454
HLFB
M
ODES
:
C
OMMON
T
O
A
LL
C
LEAR
P
ATH
O
P
M
ODES
This section discusses HLFB modes that are available for
all
ClearPath
operational modes. Later in this section we cover HLFB modes unique to
Position, Velocity , and Torque operational modes.
Enable Input
Move Profile
Velocity vs Time
Servo On
Speed Output
Pulses Per
Revolution (PPR)
Measured
Torque
PWM DUTY CYCLE (%)
PWM DUTY CYCLE (%)
50%
5%
5%
5%
40%
40%
90%
40%
80%
60%
50%
10%
50%
20%
0
V+
V-
0
1
0
1
0
0
1
1
0
1
PWM Active
HLFB Timing: HLFB output modes available in all ClearPath op modes
S
ERVO
O
N
In Servo On mode, the HLFB output asserts (conducts) when ClearPath is
enabled and not in a shutdown state. This signal is often used to monitor
ClearPath for shutdowns, or as the control signal for an external brake.
Note: the HLFB circuit cannot directly drive an external brake.
S
PEED
O
UTPUT
In Speed Output mode, the HLFB outputs a 45 Hz or 482 Hz (user
selectable) PWM waveform whose duty cycle varies in proportion to actual
motor speed. The duty cycle scales as a percentage of the maximum motor
speed configured in the currently selected operating mode.
•
5% duty cycle = 0% max speed
•
95% duty cycle = 100% max speed
The
HLFB output deasserts (i.e., 0% duty cycle, "off", non-conducting)
when the motor is disabled or shutdown.
Note:
Speed Output is not available in the Ramp to Selected Velocity and
Step and Direction operating modes.