Cautions When Using The Pwm Function - Mitsubishi Electric FX5 User Manual

Number of output pulses current value monitor
The current value of the number of output pulses of PWM output is stored.
■Corresponding devices
The device numbers corresponding to each channel are as follows.
CH1
SD5307, SD5306
■Update timing
The timing to reflect the device in operation is as follows.
• When the HCMOV/DHCMOV instruction is executed (values updated immediately)
• When the PWM/DPWM instruction is executed
• END processing
■Clear timing
The timing when the device is cleared is as follows.
• Power OFF→ON
• Reset
• STOP/PAUSE→RUN
• If the number of output pulses is set to "0" (output without any limitation), the number of output pulse current
value monitor is fixed at "0".
• The number of output pulse current value monitor can be changed even while pulses are being output.

Cautions when using the PWM function

• Set the pulse width to a value 2 μs more and period to a value 5 μs more.
• Set the value so that pulse width ≤ period.
• The PWM/DPWM instruction is not executed when a channel number not selected for PWM output in parameters setting is
specified by the PWM/DPWM instruction.
• If the all output disable flag (SM8034) is turned ON while PWM is output, PWM output is stopped. However, when the
number of output pulses is "0" (unlimited output), the operation restarts when SM8034 is turned OFF.
• In a program with interruption priority 1, the HCMOV/DHCMOV instruction specified with the following devices cannot be
executed.
- Number of output pulses
- Pulse width
- Period
• For functions that share outputs with the PWM function, refer to Page 248 Functions that share inputs and outputs.
24 HIGH-SPEED INPUT/OUTPUT FUNCTION
296
24.7 PWM Function
CH2
SD5323, SD5322
CH3
SD5339, SD5338
CH4
SD5355, SD5354