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19 BUILT-IN I/O FUNCTION
19.1 High-speed Counter Function
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High-speed counter (rotational speed measurement mode)
The rotational speed measurement mode for high-speed counters is explained below.
When in rotational speed measurement mode, pulse is counted from count input of the high-speed counter, and the rotational
speed for a specified amount of time is automatically calculated.
Set operation mode to rotational speed measurement mode by high-speed counter parameter setting.
Sets detailed settings for channel used.
Navigation window [Parameter] [FX5UCPU] [Module Parameter] [High Speed I/O] “Input Function" “High
Speed Counter" "Detail Setting" “Basic Setting"
Window
Displayed items
Item Description Setting range Default
Use/Not Use Set whether use counter or not. • Disable
• Enable
Disable
Operation Mode Set operation mode. • Normal Mode
• Pulse Density Assumption Mode
• Rotation Speed Measurement
Mode
Pulse Input Mode Set pulse input mode. • 1-Phase 1 Input (S/W Up/Down
Switch)
• 1-Phase 1 Input (H/W Up/Down
Switch)
• 1 Phase 2 Input
• 2 Phase 1 Multiple
• 2 Phase 2 Multiple
• 2 Phase 4 Multiple
• Internal Clock (1MHz)