Maximum Tag Data Link I/O Response Time - Omron NJ501-1300 User Manual

13-3-4 Maximum Tag Data Link I/O Response Time

You can find the maximum I/O response time from the total of (1) to (6) in the following figure.
(1) Input ON
response time
Input
Example: Primary periodic task
OI UPG MC
OI UPG MC
Example of data transfer processing over 3 task periods
Task period
Additional Information
Data link processing is executed as a system service. If a tag data link timeout occurs, recon-
sider the execution time for system services.
(1) Input ON Response Time
This is the delay time for the external input device from when the input occurs until the switch actu-
ally changes to ON and the time until the input data is stored in the memory area of the CPU Unit.
Refer to the input delay of each device for the input switch delay time. Also, one task period is
required until the data is stored in the memory area of the CPU Unit. Therefore, the input ON
response time is obtained as shown below.
Input ON response time = Input device delay time + Task period
NJ-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
13 Communications Performance and Communications Load
Tag data link I/O response time
(2) Send data
processing time
OI UPG MC OI
OI UPG MC
(2) (3)
(1)
System services
Controller #2
OI UPG MC
processing
Task period
(4) Network transmission delay time
(5) Receive Data
Processing Time
(3) RPI
UPG MC
Controller #1 processing
Tag data link
refresh period
System services
OI UPG MC OI
OI UPG MC
I/O refreshing
OI
User program execution
UPG
Motion control
MC
Data link processing (system
common processing 2)
(6) Output ON
response time
UPG MC OI UPG MC
Output
13
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