IDEC SmartAXIS Touch FT1A Series, User Manual

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SmartAXIS Touch User's Manual
3-57
4 Special Functions
3
Pr
oject
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High-Speed Counter Operation
The high-speed counter turns on an external output or executes an interrupt program when the current value
matches the preset value (target value).
The high-speed counter has two operation modes, single-phase high-speed counter and two-phase high-speed
counter.
For how to configure the function to turn on an external output, refer to “Comparison Actions” on page 3-59.
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Single-phase high-speed counter
Group 2, group 3, group 4, group 5 single-phase high-speed counter
• These groups only support adding counter.
• These groups support 10 kHz maximum pulse input and are capable of counting from 0 to 4,294,967,295 (32 bits).
• When the current value and the preset value match or an overflow occurs, an external output turns on or an
interrupt program is executed.
• These groups only support the reset input via a special internal relay. When the reset is executed, the current value
returns to the reset value specified by the special data registers.
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Two-phase high-speed counter
Group 1 two-phase high-speed counter
• The two-phase high-speed counter counts by the phase difference between the A-phase and B-phase pulse input.
• These groups support 5 kHz maximum pulse input and are capable of counting from 0 to 4,294,967,295 (32 bits).
• Even higher speed counting is possible by specifying 2-edge count or 4-edge count.
• When the current value and the preset value match or an overflow or underflow occurs, an external output turns on
or an interrupt program is executed.
• These groups support resetting the current value by the reset special internal relay or external clear input (Z-
phase). When the reset is executed, the current value returns to the reset value specified by the special data
registers.
Counting mode Frequency
Adding counter Group 2, 3, 4, 5: 10 kHz
Group Frequency
Group 1
2-edge count: 5kHz
4-edge count: 2.5kHz