Mitsubishi Electric MELSEC iQ-F FX5 - Page 306

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25 HIGH-SPEED INPUT/OUTPUT FUNCTION
25.3 Pulse Width Measurement Function
■FX5U/FX5UC CPU module and high-speed pulse input/output module
Pulse width measurements can be used for a maximum of 12 channels. (CPU module 4CH + high-speed pulse input/output
module 2CH  4 modules)
The input device assignment is as follows.
*1 The number in  is the head input number for each high-speed pulse input/output module.
The table below shows the measurement frequencies.
*2 The number in  is the head input number for each high-speed pulse input/output module.
The table below shows the measurement precision.
Pulse measurements
The pulse width and period are stored in special devices by the END instruction. (Page 685 Special Relay List)
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 685 Special Relay List)
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 685 Special Relay List)
CPU module High-speed pulse input/output module
*1
First module Second module Third module Fourth module
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10 CH11 CH12
X0 to X7 (Any device can be set.) X+3 X+4 X+3 X+4 X+3 X+4 X+3 X+4
FX5U-32M, FX5UC-32M FX5U-64M, FX5U-80M,
FX5UC-64M, FX5UC-96M
High-speed pulse input/output
module
*2
Measurement frequencies
X0 to X5 X0 to X7 X+3, X+4 200 kHz
X6 to X7 10 kHz
Item Description
Possible measurement range Cycle 5 s
Pulse width 5 s
Maximum measurable signal width 1073s741ms823s
Resolution 0.5 s