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What Are Data Links?
Section 5-1
Application Example of Using Offsets
In the following example, the send data from node 1 is split into three parts
and each part is received by a different node, i.e., each of the other nodes
receives only part of the send data from node 1. This enables effective use of
data link memory areas without wasting space. In this way, a type of message
service (i.e., specific data to a specific node) can be achieved through data
links.
5-1-1
Data Link Specifications
Note
1. Up to 62 nodes can be set by using Repeater Units when the network is
configured with only the 3G8F7-CLK21-EV1, CS1W-CLK23, CJ1W-
CLK23, or 3G8F7-CLK23-E.
2. When optical and optical ring connections are combined, the maximum
number of nodes is 32 and the maximum number of data link words for a
computer for manual settings is 32,000 words.
Item
Description
No. of data link nodes
Optical Ring System: 62 nodes max. (2 nodes min.)
Wired System: 32 nodes max. (2 nodes min.)
Number of
data link
words
Send areas per
node
CS or CJ Series
CS1W-CLK23 or CJ1W-CLK23:
4,000 words max.
CS1W-CLK21-EV1 or CJ1W-CLK21-EV1:
1,000 words max.
C200HX/HG/HE, CVM1/CV,
CQM1H
1,000 words max.
Computers
3G8F7-CLK23-E: 4,000 words max.
3G8F7-CLK21-EV1, 3G8F5-CLK21-E:
1,000 words max.
Data link areas
(send and
receive) that
can be created
per node
CS or CJ Series
CS1W-CLK23-E or CJ1W-CLK23-E:
20,000 words max.
CS1W-CLK21-EV1 or CJ1W-CLK21-EV1:
20,000 words max. (unit version 1.2 or later)
12,000 words max. (Pre-Ver. 1.2)
C200HX/HG/HE, CVM1/CV,
CQM1H
8,000 words max.
Computers
32,000 or 62,000 words max. (See note 2.)
Allocation of data link areas Manual setting Area 1, 2: Bit-access area (IR, CIO, and LR Areas)
DM Area (DM and EM Areas)
Automatic set-
ting equality
layout
Area 1: IR, CIO, or LR Area
Area 2: DM Area (DM and EM Areas)
Automatic set-
ting
1:N allocations
Area 1, 2: Bit-access area (IR, CIO, and LR Areas)
DM Area (DM and EM Areas)
# 1
# 2
# 3
# 4
Send data of node 1
Summary of Contents for SYSMAC 3G8F7-CLK12-EV1
Page 2: ......
Page 4: ...iv ...
Page 20: ...xx Conformance to EC Directives 6 ...
Page 48: ...28 Applications Precautions Section 1 4 Example CX Programmer Response Timeout Setting ...
Page 68: ...48 Backup Power Supply Wiring Optical Ring Systems Only Section 2 4 ...
Page 74: ...54 Using the C Library Section 3 2 ...
Page 110: ...90 Changing the Data Link Tables with Active Data Links Section 5 5 ...
Page 187: ......