LogiView

Command 'ask'

This command opens a request form and asks for user input of a value. A free text string to be displayed as form text must be passed on to the command.

This command must not be called in a conditional instruction.

Syntax:

ask({VAR},{STR_EXPR})

I/O parameters:

	{STR_EXPR}	Message text.
	{VAR}	Variable to be initialized with value input. If there is an existing value it is shown as preassignment.

Return value:

Example:

Declaration of Variables

10 ask(DOCU_FLOAT_1,"Please enter voltage [Volt]!")

Result:

DOCU_FLOAT_1 variable is defined with value input.

Other than "ask_mes" "ask" will always use the {STR_EXPR} string regardless of the active language. (No multiple language support!)

If a request form with a Yes- and a No-button should appear, then as a first parameter a logic variable has to be used.
In the normal case the Yes-button will be supported. In order to support the No-button, the message text in T_MESSAGE can be expanded by adding [NO] separated by blanks!

Example:

       
       10 ask(EP_LOGIK, "This is my text [NO]")

Functions and commands: Input/Output