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

The maximum value of the period is stored.

 • When logic switching is set to positive logic, the difference from rising edge to rising edge.
 • When logic switching is set to negative logic, the difference from falling edge to falling edge.
 • The maximum value of the period 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 minimum value of the period is stored.

 • When logic switching is set to positive logic, the difference from rising edge to rising edge.
 • When logic switching is set to negative logic, the difference from falling edge to falling edge.
 • The minimum value of the period 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)

 • When the HCMOV instruction is used, the latest ring counter value, pulse width, cycle, maximum value, and minimum value 

can be obtained.

 • The measurement mode can be changed using the special relays. Note, however, that the measurement mode cannot be 

changed during pulse width measurement. To change the measurement mode, stop pulse width measurement, change the 
measurement mode and then resume measurement.

 • Pulse measurement is possible only while in RUN status. Pulse width measurement is stopped by RUN

PAUSE and 

RUN

STOP.

SD5033, SD5032

SD5053, SD5052

SD5073, SD5072

SD5093, SD5092

SD5035, SD5034

SD5055, SD5054

SD5075, SD5074

SD5095, SD5094