DL06 Micro PLC User Manual, 3rd Edition, Rev. E
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Chapter 3: CPU Specifications and Operation
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Normal Minimum I/O Response
The I/O response time is shortest when the input changes just before the Read Inputs portion
of the execution cycle. In this case the input status is read, the application program is solved,
and the output point gets updated. The following diagram shows an example of the timing for
this situation.
In this case, you can calculate the response time by simply adding the following items:
Input Delay + Scan Time + Output Delay = Response Time
Normal Maximum I/O Response
The I/O response time is longest when the input changes just after the Read Inputs portion of
the execution cycle. In this case the new input status is not read until the following scan. The
following diagram shows an example of the timing for this situation.
In this case, you can calculate the response time by simply adding the following items:
Input Delay +(2 x Scan Time) + Output Delay = Response Time
Chapter 3: CPU Specifications and Operation
Solve
Program
Read
Inputs
Write
Outputs
Solve
Program
Scan
Solve
Program
Field Input
Input
Off/On Delay
CPU Reads
Inputs
Output
Off/On Delay
I/O Response T ime
Scan
Solve
Program
CPU Writes
Outputs
Solve
Program
Read
Inputs
Write
Outputs
Solve
Program
Scan
Solve
Program
Field Input
Input
Off/On Delay
CPU Reads
Inputs
Output
Off/On Delay
I/O Response T ime
Scan
Solve
Program
CPU Writes
Outputs
