Service - Siemens SINUMERIK 840D Operator's Manual

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03.04
5.7 User data/user variables (GUD, PUD, LUD)
5.7.1 General
Ó Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition
5.7 User data/user variables (GUD, PUD, LUD)
Function
User data (UD) can be defined by means of a variety of variables:
· GUD - global variables which are valid in all programs.
· LUD - local variables which are valid only in the program or
subroutine in which they have been defined.
· PUD - program-global variables.
Local variables (LUD) defined in the main program are turned into
program-global variables (PUD) by a setting in a machine data.
PUD variables are valid on all subroutine levels, where they can
also be written and read.
The user data (GUD) can be defined
for HMI in the Services operating area (in the Definitions directory);
reinitialization is not necessary.
The following applies:
· Definition files that are on the hard disk are not active.
· Files can be transferred to NC and activated using the
"Activate" softkey.
The user memory must be configured to a large enough size before
the GUD definition file is loaded to the control.
All relevant machine data have as a component of their name GUD.
The display of global user data (GUD) can be locked by means of the
keyswitch or a password.
For more information on how to protect global user data in the part
program, please refer to
/PGA/, Programming Guide, Advanced
Section: File and Program Management
"Parameters" Operating Area
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