Omron C500-LDP01-V1, Руководство по эксплуатации

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5-4-2 High-speed Inputs
High-speed inputs can be used by turning on pin 3 and/or pin 4 on the back panel
DIP switch. Pin 3 enables high-speed inputs on IR 0200 through IR 0203; pin 4
on IR 0204 through IR 0207. When high-speed inputs are enabled, any pulse of
0.5 ms or longer will be acknowledged regardless of when it occurs, as shown
below. The numbers in the following diagrams indicate processing as follows:
1, 2, 3...
1. When a pulse is received that is 0.5 ms or longer, the high-speed input buffer
is turned ON. The ON status is maintained until the next refresh period re-
gardless of whether or not the input remains ON.
2. When the next I/O refresh period is reached, the bit status is read from the
high-speed input buffer to the input bit.
3. If the input is OFF during the I/O refresh period, the high-speed input buffer
is turned OFF after status has been read. If the input is still ON, the
high-speed input buffer remains ON at least until the next I/O refresh period.
4. Because the high-speed input buffer is reset if the input is OFF after reading
status, the input bit is reset during the next I/O refresh period (unless the in-
put has again come ON to activate the high-speed input buffer).
High-speed Inputs Between I/O Refresh Periods
Scan time Scan time Scan time
x
b
a
(2)
(1)
(3)
(4)
I/O refresh
The Unit
ON
Input bit
OFF
ON
OFF
ON
OFF
High-speed
input buffer
High-speed
input
a: Less than 0.5 ms
x: 0.5 ms
b: 0.5 ms or longer
High-speed Input Continuing after I/O Refresh Period
(3)
(1)
(2)
(2)
(3)
(4)
I/O refresh
The Unit
ON
Input bit
OFF
ON
OFF
ON
OFF
High-speed
input buffer
High-speed
input
x: 0.5 ms
b: 0.5 ms or longer
Scan time Scan time Scan time
x
b
",- # )
Section 5-4