Omron NJ Series User Manual page 233

Precautions for Correct Use
• If the node addresses (IP addresses) are not set correctly, you may connect to the wrong
Controller and set incorrect device parameters. Download data only after you confirm that
you are connected to the correct Controller.
• If incorrect tag data link parameters are set, it may cause equipment to operate unpredictably.
Even when the correct tag data link parameters are set, make sure that there will be no effect
on equipment before you transfer the data.
• When network variables are used in tag settings, a connection error will result if the variables
are not set in the CPU Unit. Before downloading the tag data link parameters, check to con-
firm that the network variables are set in the CPU Unit. Check whether the network variable,
tag, and connection settings are correct on the Connection Tab Page and the Tag Status
Tab Page as described in 16-2-1 The Network Configurator's Device Monitor Function on
page 16-3.
• If a communications error occurs, the output status depends on the specifications of the de-
vice being used. When a communications error occurs for a device that is used along with
output devices, check the operating specifications and implement safety countermeasures.
• The built-in EtherNet/IP port is automatically restarted after the parameters are downloaded.
This restart is required to enable the tag set and connection information. Before you down-
load the parameters, make sure that restarting the port will not adversely affect the controlled
system.
• Make sure that the major CIP revision of the device registered with the Network Configurator
is the same as the major CIP revision of the NJ/NX-series CPU Unit that you use. If the major
CIP revisions are not the same, the parameters may not be downloaded. To determine
whether uploading is possible, refer to 7-2-3 Registering Devices on page 7-21.
• Do not disconnect the Ethernet cable or reset or turn OFF the power to the EtherNet/IP Unit
during the parameter download.
• Tag data links (data exchange) between relevant nodes are stopped during a download. Be-
fore you download data in RUN mode, make sure that it will not adversely affect the control-
led system.
Also implement interlocks on data processing in ladder programming that uses tag data links
when the tag data links are stopped or a tag data link error occurs.
• For EtherNet/IP Units with revision 1, you can download tag data link parameters only when
the CPU Unit is in PROGRAM mode.
• Even for Units with revision 2 or later, all CPU Units must be in PROGRAM mode to down-
load the parameters if any Units with revision 1 are included in the network.
1
Connect the Network Configurator to the network.
2
There are two ways to download the parameters.
• Downloading to All Devices in the Network
Select Network - Download.
The following dialog box is displayed.
• Downloading Individually to Particular Devices
Select the icon of the EtherNet/IP Unit to which you want to download. To select multiple no-
des, hold down the Shift Key or the Ctrl Key while you click the icons. (In the following exam-
ple, 2 nodes are selected: 192.168.250.1 and 192.168.250.2.)
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
7 Tag Data Link Functions
7
7-59