Mitsubishi Electric FX5 - Pulse Measurement Function Execution Procedure; Pulse Width Measurement Parameters

24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.3 Pulse Width Measurement Function
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Pulse measurement function execution procedure
The pulse measurement function execution procedure is shown below.
1. Check the pulse measurement specifications.
Check the specifications such as the measurement frequency of pulse measurements. (Page 261 Pulse width
measurement specifications)
2. Connect the CPU module to the external device.
For details on wiring to external devices, refer to the following manual
MELSEC iQ-F FX5U User's Manual (Hardware)
MELSEC iQ-F FX5UC User's Manual (Hardware)
3. Set the parameters.
Configure the parameters such as the pulse measurement channel settings. (Page 263 Pulse width measurement
parameters)
4. Create the program.
Create the program for using pulse measurements.
5. Run the program.
Pulse width measurement parameters
This section explains the parameters for pulse width measurement.
Set the parameters for pulse width measurement in GX Works3.
Outline of parameters
Parameters for pulse width measurement are input allocation, logical switch ,measurement modes and input response time.
Parameter setting
The following explains how to set the parameters for pulse width measurement.
For input response time, refer to Page 284 General-purpose Input Functions.
■CPU module
Navigation window  [Parameter]  [FX5UCPU]  [Module Parameter]  [High Speed I/O]  “Input Function" 
"Pulse Width Measurement"  "Detail Setting"
Window
Displayed items
Item Description Setting range Default
Use Pulse Width
Measurement
Set whether to use pulse width measurement or not. • Disable
• Enable
Disable
Input Signal Set input signal. X0 to X7 
Logical Switch Set logical switch. • Positive Logic
• Negative Logic

Measurement Mode Set measurement mode. • Always Measurement Mode
• 1 Time Measurement Mode
