Mitsubishi Electronics FX5 User Manual

19  BUILT-IN I/O FUNCTION
19.3  Pulse Width Measurement Function

The ring counter value when the rising edge is detected is stored.

Ring counter values can be changed only by the HCMOV instruction.

■Corresponding devices

The device numbers corresponding to each channel are as follows.

■Update timing

Devices are updated by the END instruction.
When the HCMOV instruction is executed, devices are updated immediately.

■Clear timing

The timing when the device is cleared is as follows.
  • Power  OFF

ON

 • Reset
  • STOP/PAUSE

RUN

 • When "0" is written by the HCMOV instruction

The ring counter value when the falling edge is detected is stored.

Ring counter values can be changed only by the HCMOV instruction.

■Corresponding devices

The device numbers corresponding to each channel are as follows.

■Update timing, clear timing

Same as the rising edge ring counter value (Page 180 Rising edge ring counter value)

The latest value of the pulse width is stored.

 • When logic switching is set to positive logic, the difference from the rising edge up to the falling edge.
 • When logic switching is set to negative logic, the difference from the falling edge up to the rising edge.
 • The latest value of the pulse width can be changed only by the HCMOV instruction.

■Corresponding devices

The device numbers corresponding to each channel are as follows.

■Update timing, clear timing

Same as the rising edge ring counter value (Page 180 Rising edge ring counter value)

SD5021, SD5020

SD5041, SD5040

SD5061, SD5060

SD5081, SD5080

SD5023, SD5022

SD5043, SD5042

SD5063, SD5062

SD5083, SD5082

SD5025, SD5024

SD5045, SD5044

SD5065, SD5064

SD5085, SD5084