Built-In Ethernet/Ip Port Data Processing Time - Omron NY532-5400 User Manual

13 Communications Performance and Communications Load

13-3-2 Built-in EtherNet/IP Port Data Processing Time

This section describes the data processing time required to transfer data between the built-in Ether-
Net/IP port and the Controller.
Data Processing Time Overview
The time required for data processing consists of the following three elements.
1. Variable Access Time
First, calculate the time required to transfer tag data (or the time required to access variables).
This calculation is performed for each task. Therefore, if the same refreshing task is set for multiple
tag sets, calculate the total time required for all tags in the tag sets.
Use the following equation to calculate the variable access time.
Variable access time [μs] = Total size of variables [bytes] × a + Number of variables × b
Number of accesses: Number of tag sets
a to d: Constant values as given below
Controller model
NY52-
2. Number of Data Transfers
Tag data is transferred as a part of task processing.
If the time required to process the data transfer is greater than the "variable access time"
cannot be sent entirely in one task period and is sent separately instead.
Number of data transfers = "Time required to send the data entirely"
*1 This is the variable access time as calculated in step 1 above.
*2 The "variable access time" refers to the maximum processing time for accessing variables. Set the time for
each task on the Task Setup Display, which is displayed by selecting Configurations and Setup - Task Setup
in the Sysmac Studio.
Precautions for Correct Use Precautions for Correct Use
The maximum number of tag data link words that can be transferred through the built-in Ether-
Net/IP port is 92,416 words. If the number of tag data link words exceeds the number of words
that can be exchanged with the Controller at one time, the data is divided and transferred in mul-
tiple data exchanges.
3. Actual Time Required for Data Transfer
You can use the task period of the refreshing task and the number of data transfers as calculated in
(2) above to calculate the actual time required to transfer the data.
Task period × Number of data transfers
13-22
+ Number of accesses × c + d
a
0.0006
÷ "Variable access time"
NY-series Industrial Panel PC / Industrial Box PC Built-in EtherNet/IP Port User's Manual (W563)
Constant value [μs]
b
0.100 1.40
*1
*2
set for the task
c d
6.6
*2
, the data