·602·
Installation manual
CNC 8055
CNC 8055i
15.
CUSTOMIZABLE SCREENS
SOFT: V02.2X
Conditional instructions.
15.5 Conditional instructions.
Conditional instructions are only available in version 2 of the configuration language. These
instructions may be used to have (IF...ELSE…) type structures that depending on particular
conditions (PLC resources, etc.) it will be possible to do the following:
• Overlay one screen or another one or change screens.
• Assign several variables to the same "Widget" item.
• Cancel part of a screen temporarily.
Flow control instructions
This instruction analyzes the given condition that must be a relational expression. If the condition
is true (result = 1), action 1 will be executed. Otherwise (result = 0), action 2 will be executed.
;(IF (condition))
;(<action1>)
;(ELSE)
;(<action2>)
;(ENDIF)
IF conditions cannot be nested; i.e. an IF instruction cannot be programmed inside another one.
On the other hand, the ELSE part can be missing in the instruction; i.e., it is possible to program
IF condition <action1>.
Example 1:
In this example, if P8 is other than 12.8, it executes the instruction WGDWIN 201. Otherwise, if P8
is equal to 12.8, it executes the instruction WGDWIN 202.
;(IF (GUP1000 NE 12.8))
;(WGDWIN 201)
;(ELSE)
;(WGDWIN 202)
;(ENDIF)
Example 2:
Example of an IF conditional instruction without the ELSE part.
;(IF (GUP100 EQ 12.8))
;(WGDWIN 201)
;(ENDIF)
Example 3:
The following program could be used to set a parameter to ·0· where the user has entered a value
that is out of the permitted range. This may be particularly interesting in the MCO/TCO mode where
the configuration file is only refreshed (updated) on start-up or after pressing the [ENTER] key.
;(IF (GUP100 GT 1000))
;(GUP100=0)
;(ENDIF)
;(W1=GUP100)
In this case, when entering the parameter value and pressing [ENTER], the configuration file is
refreshed and if the parameter value is higher than ·1000·, the parameter takes the value of ·0·.
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