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7-1
Sampling and Delay in Comparative Outputs
The sampling time or comparative output response time varies with the setting of
the number of process values to be averaged or the operating parameters (2-in-
put or holding data).
The K3TS repeats operation A (input retrieval operation) and B (arithmetic pro-
cessing and discrimination output operation) as shown in the figure below. While
operation B is executed, the comparative output transistor operates.
A
B
A
B
Data processing
Next data processing
Arithmetic processing and discrimination output (includ-
ing transistor response time)
Input retrieval (sampling time x number of times process value averaged)
If the comparative output is a relay output, the response time (C in the figure) of
the relay is added to the comparative output response time.
A
B
C
Data processing
Next data processing
Comparison relay output response time
The data processing time and comparative output response time vary with the
setting condition of each operating parameter as follows below. They do not vary
in operating parameter 2 (average value comparison).
Differences in Data Processing Time in Operating Parameter 1 (2-input)
*n: number of process values to be averaged.
Operating parameter 1 (2-input)
A (input retrieval)
B (arithmetic processing
and determination)
C (relay response time)
A only
1.04 x n * (ms)
2.08 ms
10 ms
A + B, A -- B, K -- (A + B)
2.08 x n* (ms)
4.16 ms
10 ms
B/A x 100, (1 -- B/A x 100)
2.08 x n* (ms)
5.20 ms
10 ms
Differences in Delay in Comparative Outputs in Operating Parameter 3 (Holding Data)
Operating parameter 3
(holding data)
Definition of delay
Delay in comparative outputs
Normal
The time required between output
transistor operation and input value
change.
Min.:
A + B (ms)
Max.: (A + B) x 2 (ms)
Sampling hold
The time required between output
transistor operation and timing signal
rise.
Min.:
1.04 + A + B (ms)
Max.: 2.08 + A + B (ms)
Maximum hold, minimum hold,
peak-to-peak hold
The time required between output
transistor operation and timing signal
fall.
Min.:
B (ms)
Max.: A + B (ms)
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Section 7-1
Содержание K3TS
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