IDEC FT1A-B12RA, User Manual

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ANUAL
FT9Y-B1378 5-15
5: S
PECIAL
F
UNCTIONS
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, the adding counter and the up/down selection reversible counter.
For how to configure the function to turn on an external output, see "Comparison Actions" on page 5-17.
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Single-phase high-speed counter
Group 1, group 3 single-phase high-speed counter
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These groups support the adding counter and the up/down selection reversible counter that can count both up and down.
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These groups support 100 kHz maximum pulse input and are capable of counting in a range from 0 to 4,294,967,295 (32 bits).
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When the current value and the preset value match or an overflow or underflow occurs, a comparison output turns on or an interrupt
program is executed.
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These groups support resetting the current value by the reset special internal relay or external clear input. When the reset is executed, the
current value returns to the reset value specified by the special data registers. For the reset input details, see "Reset input" on page 5-24.
Group 2, group 4, group 5, group 6 single-phase high-speed counter
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These groups only support the adding counter.
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These groups support 100 kHz maximum pulse input and are capable of counting in a range from 0 to 4,294,967,295 (32 bits).
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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.
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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, group 3 two-phase high-speed counter
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The two-phase high-speed counter counts by the phase difference between the A-phase and B-phase pulse input.
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These groups support 50 kHz maximum pulse input and are capable of counting in a range from 0 to 4,294,967,295 (32 bits).
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Even higher speed counting is possible by specifying 2-edge count or 4-edge count.
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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.
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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 1, 3: 100 kHz
Up/down selection
reversible counter
Group 1: 100 kHz
Group 3: 50 kHz
Counting mode Frequency
Adding counter Group 2, 4, 5, 6: 100 kHz
Group Frequency
Group 1
2-edge count: 50 kHz
4-edge count: 25 kHz
Group 3
2-edge count: 25 kHz
4-edge count: 12.5 kHz