165
Built-in Outputs Section 6-2
Procedure
Restrictions on the PWM(891) Outputs
• Pulse outputs 0 and 1 cannot be used for PWM(891) outputs 0 and 1 if
the origin search function is enabled for the pulse output.
Specifications
Note The frequency can be set up to 6553.5 Hz in the PWM(891) instruction, but
the duty ratio accuracy declines significantly at frequencies over 1 kHz
because of limitations in the output circuit at high frequencies.
• PWM output 0 uses OUT4 (CIO 296104)
PWM output 1 uses OUT5 (CIO 296105)
• Connect to OUT4 or OUT5.
• Disable the origin search function for pulse
output 0 or 1 by setting the Origin Search
Function Enable/Disable setting to 0.
The Origin Search Function Enable/Disable
setting for pulse outputs 0 and 1 is in the
rightmost digit (bits 00 to 03) of Programming
Console addresses 256 and 274, respectively.
Note: Disable the origin search function because the PWM output
shares the output with the origin search function's Error
Counter Reset Output and both cannot be used
simultaneously.
Execute PWM(891).
Note: PMW output 1 is supported by the
CJ1M-CPU22/CPU23 only.
Determine the pulse output port.
Wire the outputs.
PLC Setup settings
Ladder program
Item Specifications
Duty ratio CJ1M Pre-Ver. 2.0 CPU Units: 0% to 100% in 1%
increments
CJ1M CPU Units Ver. 2.0: 0.0% to 100.0% in 0.1%
increments
(Duty ratio accuracy is ±5% at 1 kHz.)
Frequency 0.1 Hz to 6,553.5 Hz
Set in 0.1 Hz units. (See note.)
Output mode Continuous mode
Instruction PWM(891)
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