Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 194

Pulse width maximum value and minimum value
The maximum value and minimum value of the pulse width from the start of measurements are stored in special devices.
(Page 195 List of special relays/special registers)
Period maximum value and minimum value
The maximum value and minimum value of the period from the start of measurements are stored in special devices.
(Page 195 List of special relays/special registers)
Switching positive logic/negative logic
The pulse input logic can be switched.
Positive logic or negative logic can be set for each channel with parameter settings.
■Operation for positive logic
Pulse input
■Operation for negative logic
Pulse input
Continuous measurement/one-time measurement mode
The pulse width measurement mode can be set.
The table below shows the measurement modes for pulse width measurements.
Mode
1 time measurement mode
Always measurement mode
The measurement mode can be changed by using a special relay. (Page 200 Measurement mode)
Signal delay time measurement
In a user program, the delay time between signals can be calculated from the rising or falling ring counters of 2 inputs.
(Page 205 Examples of program)
19 HIGH-SPEED INPUT/OUTPUT FUNCTION
192
19.3 Pulse Width Measurement Function
Pulse width
Pulse width
Description
Measures the pulse width and period only once from the start of the measurement.
Constantly measures the pulse width and period.
Cycle
Cycle