Version: 1.06 74
10.3. ModBus address
The ModBus address is the link to the outside world. When equipment must sample Tags in
TB
OX
MS, it uses its ModBus addresses; like T, SCADA or TWinSoft.
Each Tag has a unique ModBus address. By default TWinSoft proposes a ModBus address.
You can change it if you want.
10.3.1. ModBus address of System Variables
With System Variables it is a little bit different; they have two ModBus addresses:
One internal and fixed ModBus address that you don’t know. That explains why
when you are connected to TB
OX
MS, even without sending a program, you still can
see values from the Resources.
One user ModBus address that you are allowed to modify if you want. When you
create a Tag of system variable, you can change its default ModBus address.
In case you wish to access the Tag, you declare this user ModBus address.
While being On-line, the value of the Tag can be displayed
only when TWinSoft has sent the program to TB
OX
MS.
The Tag is then available for the outside world at the
ModBus address
ou have declared.
Other Tabs of the Tag configuration refer to menu where the
Tag can be declared:
For Alarms, see chapter 12
For Datalogging, see chapter 13
For Remote Tags, see chapter 14
About Presentation-write, see next chapter
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