Cautions When Using The Pulse Catch Function - Mitsubishi Electric FX5 User Manual
Melsec iq-f series
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■Operation when a pulse having an ON width of two scans or more is input
The input device is turned ON for one scan only.
Step 0
Program
ON
External
input signal
OFF
X0
ON
Input device
OFF
X0
Cautions when using the pulse catch function
• The pulse catch function operates only when "Interrupt (Rising) + Pulse Catch" is set with parameters.
• The pulse catch function can be used on inputs X0 to X17 on the CPU module. Note, however, that these inputs can be
used on up to 8 points.
• For the functions that share inputs with pulse catch function, refer to Page 248 Functions that share inputs and outputs.
Do not perform the following on inputs for which the pulse catch function is selected. Doing so results in the input device not
turning ON normally in one scan after the pulse is detected.
• Use of direct device (DX)
• Execution of input refreshing during execution of the REF, RFS, MTR instructions, etc.
24 HIGH-SPEED INPUT/OUTPUT FUNCTION
280
24.4 Pulse Catch Function
END/Step 0
Input signal turns ON
END/Step 0
1 scan ON
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