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9.3. ModBus address
The ModBus address is the link to the outside world. When equipment must sample Tags in TBOX ULP, 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.
While being On-line, the value of the Tag can be displayed only
when TWinSoft has sent the program to TBOX ULP.
The Tag is then available for the outside world at the ModBus
address you have declared.
9.3.1. 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. It explains why when you are connected to
TBOX ULP, even without sending a program, you still can see values from the Resources.
The address of these variables is 65280 + ID of the variable.
Example: [AlaRec] = 65280+10=65290
 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.
Other Tabs of the Tag configuration refer to menu where the Tag
can be declared:
For Alarms, see chapter 11
For Datalogging, see chapter 13
For Remote Tags, see chapter 14
About Presentation-write, see next chapter
Version: 2.08
TBox - ULP
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