IDEC FT1A Series User Manual page 103

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.
Single-phase high-speed counter
•
Group 1, group 3 single-phase high-speed counter
These groups support the adding counter and the up/down selection reversible counter that can count both up and down.
•
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).
•
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.
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.
Counting mode
Adding counter
Up/down selection
reversible counter
Group 2, group 4, group 5, group 6 single-phase high-speed counter
These groups only support the adding counter.
•
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).
•
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 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.
Counting mode
Adding counter
Two-phase high-speed counter
•
Group 1, group 3 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 50 kHz maximum pulse input and are capable of counting in a range 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.
Group
Group 1
Group 3
Frequency
Group 1, 3: 100 kHz
Group 1: 100 kHz
Group 3: 50 kHz
Frequency
Group 2, 4, 5, 6: 100 kHz
Frequency
2-edge count: 50 kHz
4-edge count: 25 kHz
2-edge count: 25 kHz
4-edge count: 12.5 kHz
S AXIS P
MART RO
/L U ' M FT9Y-B1378
ITE SER S ANUAL
5: S F
PECIAL UNCTIONS
5-15