8
SYSMAC LINK System Networks
can also be created using SYSMAC LINK Systems.
A SYSMAC LINK
System can consist of up to 62 PCs, including the CV500, CV1000, CV2000,
CVM1,
C200H, C1000H, and C2000H. Communications between the PCs is ac
-
complished
via datagrams, data transfers, or automatic data links in ways simi
-
lar to the SYSMAC NET Link System.
The
main dif
ferences between
SYSMAC NET Link and SYSMAC LINK Systems
is
in the structure of automatic data links and in the system configuration, e.g.,
only
PCs
can be linked in SYSMAC LINK Systems, whereas other devices can
form nodes in SYSMAC NET Link Systems.
Datagrams
transmit and receive data using a
command/response format. Com
-
mands can be issued from the user program by the DELIVER COMMAND in-
struction (CMND(194)).
Data can also be transmitted and received using the NETWORK SEND and
NETWORK RECEIVE (SEND(192)/RECV(193)) instructions in the user pro-
gram. Up to 256 words of data can be transferred for each instruction.
Automatic data links allow PCs and computers to create common data areas.
SYSMAC
LINK Unit
CV500-SLK1
1 (optical)
CV500-SLK21 (wired)
Up to 4 Units can
be mounted.
CV-series
CPU Rack/Expansion CPU Rack
CV500/CV1000/
CV2000/CVM1
C200H/C1000H/
C2000H
Note Up to four SYSMAC LINK Units (CV500-SLK11/21) can be mounted the CPU
Rack and/or Expansion CPU Rack of each CV-series PC.
Networks and Remote I/O Systems Section 1-6
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