Chapter 19 High-Speed Input/Output Function; High-Speed Counter Function; High-Speed Counter Function Overview - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

19
HIGH-SPEED INPUT/OUTPUT FUNCTION
The high-speed input/output function is explained below.
Each respective function is set by parameters in GX Works3.
Function

High-speed counter function

FX3-compatible high-speed counter function
Pulse width measurement function
Pulse catch function
General-purpose input functions
PWM function
Positioning function
19.1
High-speed Counter Function
High-speed counter function is explained below.

High-speed counter function overview

The high-speed counter is a function that counts the number of high-speed pulse inputs that cannot be counted by a
conventional counter, using the general purpose input terminal of the CPU module or high-speed pulse input/output module.
Depending on the input (module) to be used, each function of the high-speed counter is limited as follows:
Input type
CPU module
High-speed pulse input/
output module
: Supported, : Not supported
The high-speed counter assigns input and function settings by parameters and operates using the HIOEN/DHIOEN
instruction.
Parameter setting and the HIOEN/DHIOEN instruction are always required to use the high-speed counter.
High-speed counter parameter setting
High-speed counter channels (input allocation, function) and high-speed counter comparison table, etc., are set by
parameters. (Page 125 High-speed counter parameters)
High-speed counter operation mode
The three high-speed counter operation modes are as follows.
Operation mode is set by parameter. (Page 125 High-speed counter parameters)
■Normal mode
Select normal mode if you want to use as an ordinary high-speed counter. (Page 126 High-speed counter (normal mode))
19 HIGH-SPEED INPUT/OUTPUT FUNCTION
114
19.1 High-speed Counter Function
Normal mode
Pulse density measurement mode
Rotational speed measurement mode
Pulse catch function
FX3-compatible pulse catch function
High-speed counter operation mode
Normal mode Pulse density
measurement mode
 
 
Reference
Page 126
Page 129
Page 132
Page 181
Page 191
Page 206
Page 211
Page 214
Page 216
MELSEC iQ-F FX5 User's Manual (Positioning Control)
High-speed counter dedicated instructions
Rotational speed HIOEN/DHIOEN
measurement mode instruction
 
 
DHSCS, DHSCR,
DHSZ instruction

