Siemens SINUMERIK 828D Commissioning Manual page 782

Generating user dialogs
1.6 XML identifier
Tag identifier
OPERATION
PASSWORD
POWER_OFF
30
Meaning
Operation
Instructions can be moved within an equation.
Move left "<<" operator
The << function moves bits to the left. You can specify the value and the number of move
increments directly or with a variable. If the limit of the data format is reached, the bits will
be moved beyond the limit without an error message being issued.
Execution rule
Execution from left to right; '+' and '-' have priority over '<<' and '>>'
Example:
<op> idx = idx << 2 </op>
<op> idx = 3 + idx << 2 </op>
Move right ">>" operator
The >> function moves bits to the right. You can specify the value and the number of move
increments directly or with a variable. If the limit of the data format is reached, the bits will
be moved beyond the limit without an error message being issued.
Execution rule
Execution from left to right; '+' and '-' have priority over '<<' and '>>'
Example:
<op> idx = idx >> 2 </op>
<op> idx = 3+idx >> 2</op>
The tag opens a dialog for entering the password.
Once the entry has been confirmed, the character string is available in the specified refer‐
ence variable.
Syntax:
<PASSWORD refVar ="<variable name>" />
Attributes:
● refVar
Name of the reference variable
● text
Specifying an attribute replaces the default text (optional)
Example:
<PASSWORD refvar="plc/mw107" />
Example optional:
<password refVar = "plc/MD108" text="Password" />
A message prompts the operator to switch the machine off. The message text is perma‐
nently saved in the system.
Programming Manual, 10/2015, 6FC5397-3DP40-5BA3
Easy XML