Omron CS1W-CT021, Руководство по эксплуатации

Страница: 77 / 201

E(2('%<-@*4&'-,&*$'()*+
Section 3-4
)%
Capture Function A Digital Input configured to have Capture functionality will capture the current
Counter Value into the Capture Register on a rising edge (Capture Rising Edge,
Function 07) or falling edge (Capture Falling Edge, Function 08) of the Digital Input
signal. The Unit is equipped with a Capture Register for every Counter. Every time
that a Counter Value is captured the contents of the Capture Register are over-
written with the new Captured Value and the old Captured Value is lost.
The Counter Value can also be captured by using the “Capture Counter Value Bit”
in CIO.
If you want to use the Captured Value in your Ladder Program, you must use the
IORD-instruction. This instruction reads the Captured Value from the Unit into a
specified location in the memory of the PLC. For more details on using the IORD-
instruction and reading the Captured Value refer to 4-4
"IORD-Instruction" .
Stop, Capture and Continue A Digital Input configured to have Stop, Capture and Continue functionality will
Stop the Counter (= close the Gate) and Capture the current Counter Value into
the Capture Register on a rising edge of the signal applied to the Digital Input
(Stop, Capture and Continue, Function 09). On the next falling edge the Counter
will continue counting (= open the Gate). For the Stop, Capture and Continue
(Inverted) Function (10) the same functionality is applied to the Counter for
inverted signals.
Function 07:
Capture Rising Edge
Function 08:
Capture Falling Edge
Capture current Counter Value
into Capture Register
Capture current Counter Value
into Capture Register
CNT1: CNT2: CNT3: CNT4:
n+2 n+5 n+8 n+11
Capture Counter Value:
0
→
1 = Capture Counter Value
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Continue Counting Stop counting and Capture
current Counter Value into
Capture Register
Continue Counting
Gate Open
Gate Closed
Gate Open
Function 09:
Stop, Capture and Continue
Stop counting and Capture
current Counter Value into
Capture Register
Gate Open Gate Closed Gate Open
Function 10:
Stop, Capture and Continue (Inverted)
W902-E2-03.book Seite 62 Donnerstag, 7. Oktober 2004 2:06 14