1-5
1 Overview
CJ2M CPU Unit Pulse I/O Module User’s Manual
1-2 Overview of the Functions
of CJ2M Pulse I/O
1
z Maintain or Refresh (Selectable) High-speed Counter PVs
The High-speed Counter Gate Bit can be turned ON/OFF from the ladder program to select whether
the high-speed counter PVs will be maintained or refreshed.
Fixed duty ratio pulse outputs can be output from the Pulse I/O Module outputs and used to perform
position or speed control with a Servo Drive or a stepping motor that accepts pulse inputs. Each Pulse
I/O Module provides 100-kHz pulse outputs for up to 2 axes (up to 4 axes for entire CJ2M PLC).
z Trapezoidal or S-curve Acceleration and Deceleration for Positioning
Trapezoidal or S-curve acceleration and deceleration can be used for position control using the
PULSE OUTPUT (PLS2(887)) instruction.
z Triangular Control for Pulse Outputs
If the target frequency cannot be reached when the setting is changed with a PLS2(887) or
ACC(888) instruction, triangular control will be performed. If the target position is exceeded using
the specified deceleration ratio, the deceleration ratio will be automatically corrected.
z Jogging Can Be Performed
Jogging can be performed by executing the SPED(885) or ACC(888) instruction.
z Pulse Output Frequency Tracing
Changes in the pulse output frequency can be checked graphically by using the CX-Programmer's
Data Trace Window.
z Easy Interrupt Feeding
An interrupt input can be used as a trigger to switch from speed control to position control and out-
put the specified number of pulses, then decelerate to a stop using the INTERRUPT FEEDING
(IFEED(892)) instruction.
z Origin Searches and Origin Returns Can Be Performed Using the ORIGIN
SEARCH Instruction
An accurate origin search combining all I/O signals can be executed with a single instruction. It is
also possible to move directly to an established origin using the ORIGIN SEARCH (ORG(889))
instruction. It is also possible to perform origin returns by directly moving to a defined origin.
The origin search and origin return settings can be changed during operation using the MODE
CONTROL (INI(880)) instruction.
Lighting and power control can be performed by outputting variable duty ratio pulse (PWM) output sig-
nals from the outputs of the Pulse I/O Module.
Up to two PWM outputs can be used for each Pulse I/O Module (four for the entire CJ2M PLC).
Pulse Outputs
PWM Outputs
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