Mitsubishi Electric MELSEC iQ-F FX5 - Page 255

25 HIGH-SPEED INPUT/OUTPUT FUNCTION
25.1 High-speed Counter Function
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Parameters are enabled when the CPU module is powered ON or after a reset. In addition, operations
different from the parameter settings are possible by transferring values to special relays and special registers
while changing these values in the program.
For details concerning special relays and specials registers for high-speed counters, refer to Page 685
Special Relay List, Page 719 Special Register List.
Pulse density measurement mode start/stop
The pulse density measurement mode cannot measure by setting the parameter alone.
The HIOEN/DHIOEN instruction is required to start/stop measurement.
For the HIOEN/DHIOEN instruction, refer to MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/
Function Blocks).
Enable Input Enable/
Disable
Set whether to "enable" or "disable" the enable input. • Disable
• Enable

Input logic Set the enable input logic value. • Positive Logic
• Negative Logic

Ring Length Enable/
Disable
Not available for high-speed counters (pulse density measurement
mode).

Ring Length
Measurement Unit Time Set measurement unit time. (Unit: ms) 1 to 2147483647 
No. of Pulse per Rotation Not available for high-speed counters (pulse density measurement
mode).

Item Description Setting range Default