Maximum Tag Data Link I/O Response Time - Omron CJ1W-EIP21 Operation Manuals

12-3-4 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: Data is transferred in three task processing periods.
Task periods for the number of data transfers
OI UP MC OI UP MC
G G
Task period
Additional Information
• With unit version 1.03 or later, processing for tag data links is executed in the tag data link ser-
vice.
• With unit version 1.01 to 1.02, processing for tag data links is executed in the system services.
If a tag data link timeout occurs, reconsider 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
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
12 Communications Performance and Communications Load
Tag data link I/O response time
(4) Network transmission delay time
(2) Send data
processing time
(3) RPI
I/O refreshing time
OI UP MC OI UP MC
Controller #1 processing
G G
(1) (2)
(3)
Tag data link service
Controller #2 processing
Task period
(5) Receive data processing time
Tag data link
refresh period
Tag data link service
Task periods for the number of data transfers
I/O refreshing
time
OI UP MC OI UP MC OI UP MC
G G G
OI
I/O refreshing (data link processing)
UPG User program execution
MC
Motion control
System Common Processing 2
(6) Output ON
response time
OI UP MC OI UP MC
G G
Output
12-25
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