Panasonic FP7 User Manual page 99

 Processing when capture trigger inputs are used frequently
Scan time
CPU
unit
Capture enable
（Y7）
Capture trigger
(Control signal)
Count value
High-
speed
counter
unit
Capture 0 register
Capture 0 done
internal signal
Scan time
Capture 0 done
CPU
flag (X4)
unit
Read out data to
operation memory
using program
(Note 1) Turn on the capture enable signal using the user program.
(Note 2) The high-speed counter unit performs the capture operation without synchronizing with the operation of the
CPU unit every time control signals turn on as the capture trigger. The capture done internal signal used for the
system in the high-speed counter unit is reset at the time of I/O refresh of the CPU unit.
(Note 3) The capture done flag of the CPU unit is reflected in the operation memory (X4/X5) at the time of I/O refresh.
When multiple capture operations are performed continuously on the high-speed counter unit, the capture done
flag (X4/X5) stays ON.
KEY POINTS
•
Whe control signals as capture triggers are input frequently, the capture
done flag (X4/X5) stays ON. Note that when reading multiple capture data
executed in the high-speed counter unit.
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I/O refresh
Operation
0 1 2 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30
2
xxxxx
I/O refresh
Operation
xxxxx
I/O refresh
7 12 16 19
Operation Operation
7 16
(Note 1)
(Note 2)
(Note 3)
19