Data Links; Network Data Exchange - Omron CS1W-SLK11-21 - 06-2004 Manual

SYSMAC LINK Unit Functions
Network Parameters
(See page 36)
1-3-2

Data Links

Automatic Settings
(See page 49)
Manual Settings
(See page 49)
1-3-3

Network Data Exchange

Set the unit number of each Unit manually from between 0 to F Hex (0 to 15)
using the rotary switches on the front of the SYSMAC LINK Unit.
The following parameters are set with the Support Software (CX-Net within
the CX-Programmer).
• Communications cycle time
• Maximum node address
• Number of polled nodes
• Maximum number of frames
SYSMAC LINK Units can be used to create data links between PLCs and
computers on the same network. The data links support the following func-
tions: Automatic settings (communications using data link words with settings
made automatically from settings made in PLC memory), and manual settings
(communications using data link tables with settings made using the CX-Net
within the CX-Programmer).
The areas to be used in creating the data links (CIO Area and/or DM Area)
and the number of data link words for each node are set in parameters in the
DM Area.
• Data Link Table Settings
The common link parameters and refresh parameters required by data
links are set using Support Software.
Common link parameters:The same for all nodes
Refresh parameters:
• Data Link Area Settings
The data areas (i.e., CIO Area and/or DM Area) to be used in the data links
are specified in the common link parameters.
• Number of Words in Data Links
The number of data link words for each node is specified in the common
link parameters.
• Data Link Node Settings
The nodes to be linked to the local node are specified in the refresh param-
eters. It is possible to use these settings to set multiple groups within a sin-
gle network. The settings are made for each node individually.
The SYSMAC LINK Unit can send and receive data by connecting to other
networks of the same type or to different networks.
• Bridges: Commands can be used to send and receive between SYSMAC
LINK Networks.
• Gateways: Commands can be used to send and receive between net-
works with different communications protocols, such as Controller Link
and Ethernet.
Commands and data can be sent and received across a maximum of three
networks (including the local network).
Unique to each node
Section 1-3
7