High-Speed Counter Function Execution Procedure; High-Speed Counter Specifications - Mitsubishi Electric FX5 User Manual

■Pulse density measurement mode
Select pulse density measurement mode if you want to count the number of pulses for a specified amount of time. (Page
199 High-speed counter (pulse density measurement mode))
■Rotational speed measurement mode
Select rotational speed measurement mode if you want to measure speed for a specified amount of time. (Page 202
High-speed counter (rotational speed measurement mode))
High-speed counter dedicated instructions
The high-speed counter starts and stops counting using the HIOEN/DHIOEN instruction for the high-speed counter.
(MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/Function Blocks))
Other high-speed counter instructions
In addition to the dedicated instructions, there are instructions such as DHSCS, DHSCR, and DHSZ (hereafter referred to as
"high-speed comparison instruction") for high-speed counters.
For details, refer to the following.
MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/Function Blocks)

High-speed counter function execution procedure

The high-speed counter function execution procedure is as follows.
1.
Check the specifications of the high-speed counter.
Check specifications such as maximum frequency and type of high-speed counter. (Page 185 High-speed counter
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.
Set parameters such as channel (CH) of the high-speed counter. (Page 195 High-speed counter parameters)
4.
Create the program.
Create program for using the high-speed counter.
5.
Run the program.

High-speed counter specifications

High-speed counter specifications are explained below.
Types of high-speed counters
Types of high-speed counters are as follows.
■1 phase, 1 input counter (S/W)
Counting method of 1 phase, 1 input counter (S/W) is as follows.
ON
Input A phase
OFF
Count direction switching bit
Current value
OFF
Up counting
ON
Down counting
24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.1 High-speed Counter Function
24
185