Hitachi S10mini D, Hardware Manual

Page: 96 / 132

8 EXPLANATION OF OPERATION
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8.3 Processing Time
Processing time is measured from when an input signal enters the input module until it is output
from the output module. That time is the sum of (1) to (4) shown below.
Input module CPU module
Output
module
External
input signal
External
output signal
Remote I/O line Remote I/O line
Input delay
Ladder
processing
time
(10 to 999 ms)
Output delay Transfer
time
(5 to 21 ms)
Transfer
time
(5 to 21 ms)
(
1
) (
2
) (
3
) (
2
) (
4
)
(1) Input
delay
An input delay is taken by the input module to respond. The response time varies with the type
of the input module. For details, refer to the “S10mini HARDWARE MANUAL I/O
MODULE (manual number SME-1-114).”
(2) Remote I/O transfer time
The remote I/O transfer time is taken for data transfer on the remote I/O line. That time varies
with the specified number of I/O points.
512 points: About 5 ms
1024 points: About 10 ms
1536 points: About 16 ms
2048 points: About 21 ms
(3) Ladder processing time
The ladder processing time is taken by the ladder diagram program for processing. That time is
equal to the sequence cycle time (10 to 999 ms).
(4) Output delay
An output delay is taken by the output module to respond. The response time varies with the
type of the output module. For details, refer to the “S10mini HARDWARE MANUAL I/O
MODULE (manual number SME-1-114).”
Calculate the processing time using the following formula:
Processing time = (input delay) + (RI/O transfer time) + (ladder processing time) +
(RI/O transfer time) + (output delay)