Omron CP1L-EL20DR-D Operation Manual page 272

Pulse Outputs
Purpose
Perform origin search Origin functions (Origin search and
and origin return opera- origin return)
tions.
Change the target posi- Positioning with the PLS2(887)
tion during positioning. instruction
(For example, perform
an emergency avoid
operation with the Multi-
ple Start feature.)
Change speed in steps Use the ACC(888) instruction (con-
(polyline approxima- tinuous) to change the acceleration
tion) during speed con- rate or deceleration rate.
trol.
Change speed in steps Use the ACC(888) instruction (inde-
(polyline approxima- pendent) or PLS2(887) to change the
tion) during positioning. acceleration rate or deceleration rate.
Perform fixed distance Execute positioning with the
feed interrupt. PLS2(887) instruction during an
operation started with SPED(885)
(continuous) or ACC(888) (continu-
ous).
After determining the The positioning direction is selected
origin, perform position- automatically in the absolute coordi-
ing simply in absolute nate system.
coordinates without
regard to the direction
of the current position
or target position.
Perform triangular con- Positioning with the ACC(888)
trol. instruction (independent) or
PLS2(887) instruction.
Use variable duty factor Control with analog inputs and the
outputs for time-propor- variable duty factor pulse output func-
tional temperature con- tion (PWM(891)).
trol.
238
Function
Origin search and origin return operations can be exe-
cuted through pulse outputs.
• Origin search:
• Origin return:
When a positioning operation started with the PULSE
OUTPUT (PLS2(887)) instruction is in progress, another
PLS2(887) instruction can be executed to change the
target position, target speed, acceleration rate, and
deceleration rate.
When a speed control operation started with the
ACC(888) instruction (continuous) is in progress,
another ACC(888) instruction (continuous) can be exe-
cuted to change the acceleration rate or deceleration
rate.
When a positioning operation started with the ACC(888)
instruction (independent) or PLS2(887) instruction is in
progress, another ACC(888) (independent) or
PLS2(887) instruction can be executed to change the
acceleration rate or deceleration rate.
When a speed control operation started with the
SPED(885) instruction (continuous) or ACC(888)
instruction (continuous) is in progress, the PLS2(887)
instruction can be executed to switch to positioning, out-
put a fixed number of pulses, and stop.
When operating in absolute coordinates (with the origin
determined or INI(880) instruction executed to change
the PV), the CW or CCW direction is selected automati-
cally based on the relationship between the pulse output
PV and the pulse Output Amount specified when the
pulse output instruction is executed.
When a positioning operation started with the ACC(888)
instruction (independent) or PLS2(887) instruction is in
progress, triangular control (trapezoidal control without
the constant-speed plateau) will be performed if the
number of output pulses required for acceleration/decel-
eration exceeds the specified target pulse Output
Amount.
(The number of pulses required for acceleration/deceler-
ation equals the time required to reach the target fre-
quency x the target frequency.)
Two built-in outputs can be used as PWM(891) outputs 0
and 1 by executing the PWM(891) instruction.
Description
To start the origin search, set the PLC Setup to
enable the origin search operation, set the various
origin search parameters, and execute the ORIGIN
SEARCH instruction (ORG(889)). The Unit will deter-
mine the location of the origin based on the Origin
Proximity Input Signal and Origin Input Signal. The
coordinates of the pulse output's PV will automatically
be set as the absolute coordinates.
To return to the predetermined origin, set the various
origin return parameters and execute the ORIGIN
SEARCH instruction (ORG(889)).
Section 7-2