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Setting Data Links Section 5-2
Note 1. Be sure to set the bit in the DM Area’s (CPU Bus Unit Area’s) software
switches (DM30000 + 100 × unit number) described as “always set to 0” to
0. Not doing so may result in the data link not starting properly.
2. The default data link mode is for manual setting (00), but check the setting
from the Programming Device.
3. A data link mode can be set in a data link startup node only. The data link
mode setting is determined by the data link mode of the startup node even
if the data link mode settings of the nodes participating in the data links are
different from the settings in the startup node.
4. In manual setting, a data link table must be set in the data link startup node
and in automatic setting, automatic data link setting parameters must be
set in the data link startup node. Data links will not be started unless the
settings are correct.
5. Always check whether the data link settings for all startup nodes in the cor-
responding network are correct to prevent starting up using with incorrect
data link modes and parameters. Make sure that both automatic setting
and manual setting modes are not used together in the same network and
that automatic settings with different parameters are not used.
5-2-2 Manual Setting
Transfer the data link tables that were created on the Controller Link Support
Software or CX-Net (in CX-Programmer) to the Controller Link Unit or the
Controller Link Support Board (for IBM PC/AT or compatible computers).
The data link tables are transferred from a computer running the Controller
Link Support Software. The computer can either be a node in the network or a
computer attached as a Programming Device.
Transferring from a Programming Device
Note 1. When transferring data link tables to a CS/CJ-series PLC, turn OFF pin 1
of the DIP switch on the CPU Unit. Otherwise, data link tables cannot be
written normally.
2. When transferring the data link tables to a CVM1 or CV-series PLC, set the
System Protect Keyswitch on the CPU Unit to “NORMAL.” Otherwise, data
link tables cannot be written normally.
3. Use the CX-Net in CX-Programmer version 1.20 or higher for CQM1H
Controller Link Units. The Controller Link Support Software can also be
used. (Refer to the Controller Link Support Software Operation Manual
(W308) for details.)
…
Nodes
Controller
Link Unit
CPU Unit
+
Transmissions
Setting data link tables
RS-232C
IBM PC/AT or
compatible
Controller Link
Support Soft
ware or CX-
Net (in CX-
Programmer)