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Project example
Configuring the alarm system
Defining process variables
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206 SHP−VWNS DE/EN 6.1
4.7.1 Defining process variables
1. Double−click the Variables
® Channels ® Internal node in Project Explorer.
The table editor for defining variables is opened.
2. Press the [F8] key to define the following three variables:
Properties for process variables
No. Tab/Property Value
1 General
Alias MessageSource
Data type VT_I2
2 General
Alias MessageState
Data type VT_I2
3 General
Alias GroupFunction
Data type VT_I2
The variables defined here are sufficient as a functional data link:·
– MessageSource contains the bits that trigger the alarms.
– MessageStates contains the alarm states sent back from the core functions.
– GroupFunction is used to control alarm functions by means of the higher−level
group.
The definitions are now applied in the alarm system.