Mitsubishi Electric MELSEC iQ-F FX5 - High-speed counter (rotational speed measurement mode)

25 HIGH-SPEED INPUT/OUTPUT FUNCTION
25.1 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. The rotational speed measurement
mode is not supported in high-speed pulse input/output modules.
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.
Parameter setting
Set operation mode to rotational speed measurement mode by high-speed counter parameter setting.
Sets detailed settings for channel used.
Navigation window  [Parameter]  [Module model name]  [Module Parameter]  [High Speed I/O]  "Input
Function"  "High Speed Counter"  "Detailed Setting"  "Basic Settings"
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)

Preset Input Enable/
Disable
Not available for high-speed counters (rotational speed
measurement mode).

Input logic
Input Comparison Enable/
Disable
Control Switch
Preset Value