Omron NJ501-1300 - Starting and Stopping Tag Data Links

7 Tag Data Link Functions
7-8
NJ-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
the entire network, and so packets are sent to nodes that do not require them, which will cause the
communications load on those nodes to increase. To use a multi-cast connection and send an out-
put tag set in one packet to multiple nodes, the following settings for the receiving node must be the
same as the settings of the sending node: the connection type (multi-cast), the connection I/O types,
packet internals (RPI), and timeout values.
Precautions for Correct UsePrecautions for Correct Use
The performance of communications devices is limited to some extent by the limitations of each
product’s specifications. Consequently, there are limits to the packet interval (RPI) settings. Refer
to 13-2 Adjusting the Communications Load and set an appropriate packet interval (RPI).
Tag data links are automatically started when the data link parameters are downloaded from the Net-
work Configurator and the power supply to the NJ-series Controller is turned ON. Thereafter, you can
start and stop tag data links for the entire network or individual devices from the Network Configurator.
Starting and stopping tag data links for individual devices must be performed for the originator. Further-
more, you can use system-defined variables to start and stop the entire network. Refer to
7-2-10 Start-
ing and Stopping Tag Data Links for details.
You can include the Controller status as a member of a tag set in the data sent and received. The Con-
troller status is a set of flags that indicate the operating status of the CPU Unit (operating information,
error information, Controller error level). If the Controller status is specified as an output (send) tag, the
Controller status is added to the start of the tag set in the following format. (Select the
Include Option for
the Controller Status in the upper right of the Edit Tag Set Dialog Box.)
To receive the Controller status, specify the Controller status for the In - Consume Tab Page in the dia-
log box used to edit the receive tag set. (Select the
Include Option for the Controller Status in the upper
right of the Edit Tag Set Dialog Box.) When a tag data link is started, the contents of the Controller sta-
tus is stored in the system variables that are given below.
• _EIP_TargetPLCModeSta (Target PLC Operating Mode)
• _EIP_TargetPLCErr (Target PLC Error Information)
7-1-5 Starting and Stopping Tag Data Links
7-1-6 Controller Status
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 0 0
Major fault level
Controller error
Partial fault level Controller error
Minor fault level
Controller error
Controller Error Flag
Controller Operating Flag