Programming
2.6 Methods
Expanding the user interface
2-62 Commissioning Manual, 11/2006, 6FC5397-0DP10-0BA0
2.6 2.6 Methods
Overview
Various types of event (exit input field, actuate softkey) can initiate specific actions in dialogs
and dialog-dependent softkey menus (softkey menus that are called from a newly configured
dialog). These actions are configured in methods.
The following table shows the basic principle used to program a method:
Definition block Comment Chapter reference
PRESS(HS1)
;Method start identifier
LM...
LS...
;Functions See chapter "Functions"
Var1.st = ...
;Changing properties see chapter "Softkey menu"
and chapter "Dialog elements"
Var2 = Var3 + Var4
...
EXIT
;Calculation with variables See chapter "Defining variables"
END_PRESS
;Method end identifier
2.6.1 CHANGE
Description
CHANGE methods are executed if a variable value changes, i.e., variable calculations that
are performed as soon as a variable value changes are configured within a CHANGE
method.
There are two types of CHANGE method, i.e., element-specific and global:
● The element-specific CHANGE method is executed if the value of a specified variable
changes. If a system or user variable is assigned to a variable, cyclic updating of the
variable value can be configured in a CHANGE method.
● The global CHANGE method is executed if the value of any variable changes and no
element-specific CHANGE method has been configured.
"Element-specific" programming
Syntax: CHANGE
(Identifier)
...
END_CHANGE
Description: Changes the value of a specific variable
Parameters: Identifier Name of the variable
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