Displaying/Canceling The Access Protection; Displaying Cross References - Siemens SINUMERIK 840D sl Operating Manual

16.18

Displaying/canceling the access protection

You can password protect your program organizational units (POUs) in the PLC 828
programming tool. This prevents other users from accessing this part of the program. This
means that it is invisible to other users and is encrypted when it is downloaded.
A lock symbol is used to show a password-protected POU in the block overview and in the
ladder diagram.
Procedure
16.19

Displaying cross references

You can display all the operands used in the PLC user project and their use in the list of
cross references.
This list indicates in which networks an input, output, bit memory etc. is used.
The list of cross references contains the following information:
● Block
● Address in the network
● Context (command ID)
Symbolic and absolute address
You can choose between specification in absolute or symbolic address.
Elements for which there are no symbolic identifiers are automatically displayed with
absolute identifiers.
Universal
Operating Manual, 03/2013, 6FC5398-6AP40-3BA1
1. The ladder diagram display (LAD) is opened.
2 Select the relevant program organizational unit (POU) in the overview
and press the "Program block" softkey.
3. Press the "Protection" softkey.
The "Protection" window appears.
4. Enter your password and press the "Accept" softkey.
Ladder Viewer and Ladder add-on (828D only)
16.18 Displaying/canceling the access protection
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