3-13
Section
Connecting Multiple Masters in one Network
87
5. Select two or more Master parameters that you want to check for duplicate
remote I/O allocations. Select the Master parameters while pressing the
Control Key.
When three or more Master parameters have been selected, the Configura-
tor will check for duplications among all of the selected parameters.
6. Click on “OK” to start the duplication check. The results are output to a text
file (DUPLOG.TXT), the file is opened, and its contents are displayed.
The DUPLOG.TXT file is created in the main CompoBus/D Configurator
directory. If there is an existing DUPLOG.TXT file, it will be overwritten.
The DUPLOG.TXT file will be opened in the program that automatically han-
dles text files, such as the Notepad program.
7. After viewing the contents of the DUPLOG.TXT file, close the file and exit the
Notepad (or similar) program. If there are duplications in remote I/O alloca-
tions, edit the Master parameters to eliminate the duplications. See 3-6
Creating and Editing Master Parameters for details.
3-13 Connecting Multiple Masters in one Network
Two or more Masters can be connected to a CompoBus/D network and perform
independent remote I/O communications. This section explains the factors that
must be considered when connecting more than one Master Unit.
When connecting more than one Master to a network, be sure not to use the
same Slave (including Slaves set for “Explicit communication only”) for remote
I/O communications with more than one Master. There will be conflicts that pre-
vent proper communications if Slaves are involved in remote I/O communica-
tions with more than one Master. Similarly, Slave conflicts will occur and proper
communications won’t be possible if there is even one Master operating in scan
list disabled mode.
Carefully check the Master parameters of Masters being connected to the same
network and make sure that no Slaves are duplicated. Also, when remote I/O
communications are being performed in the network, make sure that none of the
Masters will operate in scan list disabled mode.
Other than avoiding Slave duplications, the precautions for connecting more
than one Master are the same as those for connecting just one Master. Refer to
sections 3-1 to 3-11 for information on settings and operations.
Precautions for
Connecting Multiple
Masters