Table of Contents
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Functions Listed by Purpose
Purpose
Perform fixed distance
feed interrupt.
After determining the
origin, perform position-
ing simply in absolute
coordinates without
regard to the direction
of the current position
or target position.
Perform triangular con-
trol.
Use variable duty ratio
outputs for time-propor-
tional temperature con-
trol.
8
I/O used
Function
Built-in
Pulse out-
Execute positioning
Outputs
puts 0 and
with the PLS2(887)
1
instruction during an
operation started with
SPED(885) (continu-
ous) or ACC(888) (con-
tinuous).
Built-in
Pulse out-
The positioning direc-
Outputs
puts 0 and
tion is selected auto-
1
matically in the absolute
coordinate system.
Built-in
Pulse out-
Positioning with the
Outputs
puts 0 and
ACC(888) instruction
1
(independent) or
PLS2(887) instruction.
Built-in
PWM(891)
Control with analog
Outputs
outputs 0
inputs and the variable
and 1
duty ratio pulse output
(See note.)
function (PWM(891))
Note PWM(891) output 1 is not supported by the CJ1M-CPU21.
Description
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, output 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, triangu-
lar control (trapezoidal control without the
constant-speed plateau) will be performed if
the number of output pulses required for
acceleration/deceleration exceeds the speci-
fied target pulse Output Amount.
(The number of pulses required for accelera-
tion/deceleration equals the time required to
reach the target frequency x the target fre-
quency.)
Two of the built-in outputs (bits 04 and 05 of
CIO 2961) can be used as PWM(891) out-
puts 0 and 1 by executing the PWM(891)
instruction.
Section 1-3
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