Bus Configuration - Omron C200HW-PRM21 Operation Manuals

Operation

4-3-3 Bus configuration

Master selection
Multiple Masters
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The first step to build a configure a Master Unit is to open a blank sheet
through the menu item 'File – New', or the icon
.
Add the Master unit to be configured using 'Insert – Master' or the icon
Position the cursor to a line on the blank sheet, preferably at the top left, and
click to insert a Master Unit. A list of masters whose GSD files are found in
the Device Database folder is shown.
Select the C200HW-PRM21 from the list of available masters, and click the
'Add>>' button:
Selecting the added Unit from the list 'Selected Masters' allows you to set its
bus address before clicking 'OK'.
It is possible to add multiple masters to a PROFIBUS-DP configuration.
However, each slave can only exchange data with a specific master, and
data exchange between masters is not possible.
The presence of multiple masters in one system will however affect the
overall bus parameter settings, and building a single configuration will help to
keep overview over which slave addresses are assigned to which master.
If multiple masters are defined in one configuration, always pay attention as to
which master subsequently inserted slaves are being assigned. Modifying the
assignment of slaves in a later stage may affect the mapping of other slaves'
I/O data to the Master's I/O buffers.
Section 4-3