Controlling Pulse Outputs - Omron CJ - 09-2009 Operation Manual

CJ1M Functions Arranged by Purpose
1-9-2

Controlling Pulse Outputs

Purpose
Perform simple posi- Built-in
tioning by outputting Outputs
pulses to a motor driver
that accepts pulse-train
inputs.
Perform origin search Built-in
and origin return opera- Outputs
tions.
Change the target posi- Built-in
tion during positioning. Outputs
(For example, perform
an emergency avoid
operation with the Multi-
ple Start feature.)
Change speed in steps Built-in
(polyline approxima- Outputs
tion) during speed con-
trol.
Change speed in steps Built-in
(polyline approxima- Outputs
tion) during positioning.
68
I/O used Function
Pulse out- Pulse output functions
puts 0 and
• Single-phase pulse
1
• Single-phase pulse
• Single-phase pulse
Pulse out- Origin functions (Origin
puts 0 and search and origin
1 return)
Pulse out- Positioning with the
puts 0 and PLS2(887) instruction
1
Pulse out- Use the ACC(888)
puts 0 and instruction (continuous)
1 to change the accelera-
tion rate or decelera-
tion rate.
Pulse out- Use the ACC(888)
puts 0 and instruction (indepen-
1 dent) or PLS2(887) to
change the acceleration
rate or deceleration
rate.
The built-in outputs (bits 00 to 03 of
CIO 2961) can be used as pulse outputs 0
and 1.
output without accel-
eration/deceleration Target frequency: 0 Hz to 100 kHz
Controlled by SPED.
Duty ratio: 50%
The pulse output mode can be set to CW/
output with accelera-
CCW pulse control or Pulse plus direction
tion/deceleration
control, but the same output mode must be
(equal acceleration
used for pulse outputs 0 and 1.
and deceleration
rates for trapezoidal Note The PV for pulse output 0 is stored in
form)
Controlled by ACC.
output with trapezoi-
dal for (Supports a
startup frequency
and different acceler-
ation /deceleration
rates.)
Controlled by
PLS2(887).
Origin search and origin return operations
can be executed through pulse outputs.
• Origin search:
To start the origin search, set the PLC
Setup to enable the origin search opera-
tion, set the various origin search parame-
ters, and execute the ORIGIN SEARCH
instruction (ORG(889)). The Unit will
determine 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.
• Origin return:
To return to the predetermined origin, set
the various origin return parameters and
execute the ORIGIN SEARCH instruction
(ORG(889)).
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 posi-
tion, 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 (con-
tinuous) can be executed 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.
Section 1-9
Description
A276 and A277. The PV for pulse
output 1 is stored in A278 and A279.