Rockwell Automation 1785-Lx6B,D17856.5.13 MNL. PLC-5 PROTECTED PROCESSOR - Manual (Page 24)

Chapter 3
Configuring DTE Protection
3-3
As system administrator, you specify ranges of protection in the DTEP file
using three consecutive words for each range entry.
Enter the file ranges that you want protected by following the steps on
the left.
Address 0 1 2 3 4 5 6 7 8 9
N10:0 0 0 0 0 0 0 0 0 0 0
N10:10 0 0 0 0 0 0 0 0
Press a function key or enter a value.
N10:0 =
Rem Prog Forces:None Data:Decimal Addr:Decimal 5/46 File PROTECT
Change Specify Next Prev
Radix Address File File
F1 F5 F7 F8
Follow these guidelines:
• Enter the protection-range three-word entries starting at element zero ( 0 )
and proceeding in contiguous entries for all of the ranges to be specified.
• The starting and ending elements within each range entry must be in
ascending order—except when protecting only one element and they
are therefore equal.
• Specify a starting element of zero (0) and an ending element of 999 to
protect an entire file regardless of how many elements are actually in
the file.
• Indicate intentionally unused protection range entries in the DTEP file by
placing a ‘
-1 ’ in the Data-Table File Number field.
• Enter any number of protection ranges up to 333.
• Make the DTEP file only as large as is necessary to specify all of the
required protection ranges.
While using the protection mechanism does not affect the performance of
Run mode program execution in any noticeable way, it can affect the
responsiveness of the processor to commands that are received from the
end user. Follow these guidelines to minimize this:
- Minimize the number of the protection ranges specified.
Rather than specifying several protection ranges in a data-table file,
consider protecting the entire file with a single range.
- Keep the size of the DTEP file at the minimum required for the
number of protection ranges required.
Enter Protection File Address
Data
F8
Monitor
FFF
Data-Table
File Number
Starting
Element
Number
(Ø-999) Ending
Element
Number
(Ø-999)
SSS EEE
Enter the ranges in the
following format:
Monitor File
F8
Cursor to Progam File
6200
Main Menu
Online
Program
F1
Entering Data-Table Ranges
into the Protection File
Tip
Excess space in the
DTEP file is filled with
zeros by default; any
resultant “0 0 0” grouping
would be interpreted as
protecting file 0, element 0—
i.e., O:Ø. Avoid this by
placing a ‘–1’ in any inten-
tionally unused space.