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
9 5
T
EKNIC
,
I
NC
. T
EL
.
(585)
784-7454
F
OLLOW
D
IGITAL
T
ORQUE
C
OMMAND
(U
NIPOLAR
PWM
C
OMMAND
)
M
ODE
D
ESCRIPTION
Connect a digital PWM waveform from your PLC or other device, and
ClearPath will generate torque that is proportional to the duty cycle of the
PWM waveform.
Assert the Enable Input to energize the motor. Motor torque is controlled
be applying a variable PWM signal to Input B. 0% PWM duty cycle
commands zero torque, and 100% duty cycle commands full-scale torque.
Direction of shaft rotation is controlled by the state of Input A. See Inputs
and Timing table below.
Signal
Function
Input Type
Input A
Motor torque vs. time
Input B
Enable
Direction
Torque
Enable
NA
NA
Trigger
Logic: High=CW Low=CCW
Pulse: Variable PWM
Logic: High=Enable Low=Disable
0
1
0
1
t
tq
Example Timing
Notes:
0
1
0
1
Duty cycle of applied PWM signal (%)
90%
10%
OFF
Variable Torque With Unipolar PWM Input Control
Torque Control
I/O
F
UNCTIONS
Enable Input -
Asserting this input energizes the motor shaft.
Input A -
This input selects the direction of the applied torque.
Input B -
This input is connected to a PWM signal whose duty cycle
represents the desired torque.
Output (HLFB) -
See HLFB section for available modes.
Notes:
•
PWM input frequency range: 20 Hz to 30 kHz.
•
If the PWM signal is off for 50mS (or more) the PWM input is
considered off. This is interpreted by ClearPath as a zero-torque
command.
•
Disable time = 10 mS
MCVC + MCPV
Available on