A-9
Appendices
CJ2M CPU Unit Pulse I/O Module User’s Manual
A-3 Comparison to CJ1M Built-in I/O Functions
App
Pulse output Number of control
axes
4 axes (2 × 2 Pulse I/O Modules) 2 axes
Pulse output method CW/CCW or Pulse + direction CW/CCW or Pulse + direction
Numeric range 32 bits
(−2,147,483,648 to +2,147,483,647)
(0 to +4,294,967,295)
32 bits
(−2,147,483,648 to +2,147,483,647)
(0 to +4,294,967,295)
Output frequency 1 pps to 100 kpps 1 pps to 100 kpps
Acceleration/decelera-
tion control
Trapezoidal (linear or S-curve) Trapezoidal (linear or S-curve)
Internal pulse control
frequency
1 or 4 ms (Set in the PLC Setup.) 4 ms
Defining the origin Origin search with ORG(889) instruc-
tion
Changing PV with INI(880) instruction
Origin search with ORG(889) instruc-
tion
Changing PV with INI(880) instruction
Changing origin
search parameters
• PLC Setup (when power is turned
ON)
• When INI(880) instruction is executed
PLC Setup (when power is turned ON)
Interrupt feeding • Combining ACC(888) + PLS2(887)
instructions
• IFEED(892) instruction
Combining ACC(888) + PLS2(887)
instructions
Monitoring output fre-
quencies
Trend monitoring of output frequencies
with the data trace function of the CX-
Programmer
Reading output frequencies with
PRV(881) instruction
Differ-
ences in
operation
Actual output fre-
quency
Integer division of 33.33 MHz Integer division of 20 MHz
Update timing for PLC
Setup
Update timing for origin detection
method: When power is turned ON
Update timing for origin detection
method: When operation is started
Allocation of I/O termi-
nals
If not using the origin search is speci-
fied, unused terminals can be used for
other functions depending on the oper-
ation mode.
If not using the origin search is speci-
fied, unused terminals cannot be used
for other functions regardless of the
operation mode
PWM outputs Number of outputs 4 outputs (2 × 2 Pulse I/O Modules) 2 outputs
Output frequency, duty
ratio
• 0.1 to 6,553.5 Hz, 0% to 100%
• 0.1 to 6,553.5 Hz, 0.0% to 100.0%
• 1 to 32,800 Hz, 0.0% to 100.0%
• 0.1 to 6,553.5 Hz, 0% to 100%
• 0.1 to 6,553.5 Hz, 0.0% to 100.0%
Output accuracy ON duty: +2%, −0%
For 1-kHz, 0.5 mA output
ON duty: +5%, −0%
For 1-kHz, 0.5 mA output
Differ-
ences in
operation
Actual output fre-
quency
Integer division of 33.33 MHz Integer division of 20 MHz
Timing of stopping
output for INI(880)
instruction
Output stopped immediately when
INI(880) instruction is executed.
Output stopped one pulse period after
INI(880) instruction is executed.
Item
Specification/performance
CJ2M with Pulse I/O Module CJ1M built-in I/O
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