Ethernet/Ip Communications - Omron SYSMAC FH Series User Manual

2 Methods for Connecting and Communicating with External Devices
2-3-3

EtherNet/IP Communications

With commands and responses via communications between the PLC and the Sensor Controller us-
ing EtherNet/IP tag data link, the PLC can control the Sensor Controller and make it output data after
measurements.
The Sensor Controller supports EtherNet/IP conformance tests.
The settings for tag data links are performed with the support software dedicated to it.
When you connect to an OMRON Controller to communicate with it via EtherNet/IP, use the Network
Configurator to perform the tag data link settings such as tag, tag set, and connection setting.
This section describes how to use the Network Configurator to perform tag data link settings.
For details of the tag data link settings using Network Configurator, refer to the following manuals.
• NJ-series CPU Unit Built-in EtherNet/IP Port User's Manual (Cat. No. W506)
• CS/CJ series EtherNet/IP Units Operation Manual (Cat. No. W465)
• CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (Cat. No. W495)
Precautions for Correct Use
• Since a reasonable amount of measurement takt time is required to have stable communica-
tions in an operation under high load, verify the operation under the conditions that are to be
actually applied.
• On a network to which many devices are connected, performance may drop (e.g., responses
may be delayed or packets lost) or communications errors may occur when there is tempora-
rily high traffic on the network. Test the operation under actual conditions before you start ac-
tual operation of the system.
• When the measurement interval is short, the measurement processing load is high, or com-
mand processing for operations such as scene group changing is time-consuming, the Sen-
sor Controller prioritizes measurement processing and control processing over communica-
tion processing. As a result, communication between an external device and the Sensor Con-
troller may be temporarily interrupted, and a communication error may occur.
In this case, set the communication error timeout time longer than the Sensor Controller's
processing time, or lengthen the measurement interval. Set the communication error timeout
time in the tag data link connection settings
Timeout value > Measurement time on Sensor Controller.
*1: Use Support Software, such as the Network Configurator, to change the tag data link con-
nection settings.
For details of setting the tag data links using the Network Configurator, refer to 2-3-8 Setting
Tag Data Link on page 2 - 208.
2 - 196
*1
as follows:
FH/FHV Series Vision System User's manual for Communication Settings (Z342-E1)