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CJ1-H and CJ1M CPU Unit Features Section 1-3
■ Trigger Interrupts at a Target Value or in a Specified Range
Interrupts can be triggered when the high-speed counter’s PV matches a tar-
get value or is within a specified range.
■ Measure the Frequency of High-speed Counter Inputs
The PRV(881) instruction can be used to measure the input pulse frequency
(one input only.)
■ Maintain or Refresh (Selectable) High-speed Counter PVs
The High-speed Counter Gate Bit can be turned ON/OFF from the ladder pro-
gram to select whether the high-speed counter PVs will be maintained or
refreshed.
Pulse Outputs
Fixed duty ratio pulses can be output from the CPU Unit's built-in outputs to
perform positioning or speed control with a servo driver that accepts pulse
inputs.
■ CW/CCW Pulse Outputs or Pulse + Direction Outputs
The pulse output mode can be set to match the motor driver's pulse input
specifications.
■ Automatic Direction Selection for Eas y Positioning with Absolute
Coordinates
When operating in absolute coordinates (origin defined or PV changed with
the INI(880) instruction), the CW/CCW direction will be selected automatically
when the pulse output instruction is executed. (The CW/CCW direction is
selected by determining whether the number of pulses specified in the
instruction is greater than or less than the pulse output PV.)
■ Triangular Control
Triangular control (trapezoidal control without a constant-speed plateau) will
be performed during positioning executed by an ACC(888) instruction (inde-
pendent) or PLS2(887) instruction if the number of output pulses required for
acceleration/deceleration exceeds the specified target pulse Output Amount.
Previously, an error would have occurred under these conditions and the
instruction would not have been executed.
■ Change Target Position during Positioning (Multiple Start)
When positioning was started with a PULSE OUTPUT (PLS2(887)) instruc-
tion and the positioning operation is still in progress, another PLS2(887)
instruction can be executed to change the target position, target speed, accel-
eration rate, and deceleration rate.
■ Switch from Speed Control to Positioning (Fixed Distance Feed Interrupt)
A PLS2(887) instruction can be executed during a speed control operation to
change to positioning mode. This feature allows a fixed distance feed interrupt
(moving a specified amount) to be executed when specific conditions occur.
■ Change Target Speed and Acceleration/Deceleration Rate during
Acceleration or Deceleration
When trapezoidal acceleration/deceleration is being executed according to a
pulse output instruction (speed control or positioning), the target speed and
acceleration/deceleration rate can be changed during acceleration or deceler-
ation.
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