Jetter JC-120MC, User Manual

Page: 342 / 634

342 Jetter AG
10 Programming
STX instruction for the input of numerical values
Function UserInput(Dev:Int,
Pos:Int):Double;
Parameter Value Description
Dev 0 ... 4 Number of the device where the
value is to be input
Pos 1 ... Possible number of
characters on the screen
Cursor position starting from which
the input field is to be displayed
Result of the function
Type Double
Value Value that has been input
You can invoke the instruction and assign its return value to a variable in the
following way:
AutoSet[Index].Destination := UserInput( 0 , 10 );
The controller processes this instruction in the following steps:
Step Description
1 The controller displays the suggested value on device 0 starting from
cursor position 10 , prepares an input field and activates the cursor.
2 The task stops at the STX instruction UserInput() , until it is aborted or
until it is completed by the user by pressing the key ENTER ([ ↵] ).
3 If ... ... then ...
... you press the key ENTER ([ ↵] ), ... the controller assigns the value
that has been input to the variable
and continues the task with the next
instruction.
... the STX instruction
UserInput() instruction is
aborted,
... an exception is thrown and step 4
is carried out.
4 If ... ... then ...
... an exception handling has been
programmed,
... the task proceeds with the
exception handling.
... no exception handling has been
programmed,
... the task is aborted and the error is
displayed in the error register.
Function declaration
Function parameters
Result of the function
How to use this
instruction
Operating principle