Omron CS1W-HCA12-V1, Руководство по эксплуатации

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199
Cycle Time
Section 8-3
8-3-3 I/O Response Time
The I/O response time is the time it takes after an input signal has been
received (i.e., after an input bit has turned ON) for the Customizable Counter
Unit to check and process the information and to output a control signal (i.e.,
to output the result of the processing to an output bit). The I/O response time
varies according to the timing and processing conditions.
The minimum and maximum I/O response times are shown here, using the
following program as an example.
The following conditions are taken as examples for calculating the I/O
response times.
Input ON delay: 0.05 ms
Overseeing time: 0.1 ms
Instruction execution time: 0.001 ms
Output ON delay: 0.1 m
Position of output instruction: Beginning of program
Communications ports: Not used.
Miminum I/O Response
Time The Customizable Counter Unit responds most quickly when it receives an
input signal just prior to the input refresh phase of the cycle, as shown in the
illustration below.
When Cyclic Output Refreshing Is Used:
Minimum I/O response time = 0.05 + 0.101 + 0.1 = 0.251 ms
Note Faster response times (100
m
s standard
)
can be achieved by using input inter-
rupts and the IORF instruction.
Input
Output
Input ON delay
Instruction execution
Cycle time
With cyclic output refresh
I/O refresh
Overseeing, etc.
Output point
Input
point
Input
bit
Internal
processing
Instruction execution
Output ON
delay