Rockwell Automation 1785-Lx6B,D17856.5.13 MNL. PLC-5 PROTECTED PROCESSOR - Manual (Page 25)

Chapter 3
Configuring DTE Protection
3-4
This is important because the protected processor scans the file
completely, from the first to the last element, when verifying the
file as well as when screening the DTEP-screened commands.
Figure 3.1
Entering Ranges in a DTEP File
Address 0 1 2 3 4 5 6 7 8 9
N10:0 0 0 3 1 1 2 7 0 100 11
N10:10 10 10 –1 0 0 16 0 999
Press a function key or enter a value.
N10:0 =
Rem Prog Forces:None Data:Decimal Addr:Decimal 5/46 File protected
Change Specify Next Prev
Radix Address File File
F1 F5 F7 F8
These ranges are entered in decimal by default. If you are entering a range
from one of the I/O image files, you can press
F1 — Change Radix then
F2 — Octal Data and enter the range in octal. When you change back to
decimal, the conversion is done for you.
Address 0 1 2 3 4 5 6 7 8 9
N10:0 000000 000000 000003 000001 000001 000002 000007 000000 000144 000012
N10:10 000012 000012 177777 000000 000000 000020 000000 001747
Important: The validity of your protection-range entries is not checked
when you enter them via data monitor, but they are validated when a
screened command is received from an end user during online programming.
If they are not valid:
• an error code is returned
• a minor fault (S:17/12) is set
You, as system administrator, must follow the steps on page 3-8 to force
validation of these entries before turning the system over to end users.
Tip
Even if you, as system
administrator, have
already removed the
privilege to write to a
data-table file, you can
still protect it with DTEP
and benefit from DTEP’s
more extensive protection
features (e.g., against
unauthorized writes by end-
user output instructions).
DTE
Protection File #
Processor Status File
S:63
DTEP File #10
•
File 0 (output image) is protected from element 0 to 3
•
File 1 (input image) is protected from element 1 to 2
•
File 7 is protected from element 0 to 100
•
File 11 element 10 only is protected
•
The next range is skipped
•
All of file 16 is protected
10
0 0 3
1 1 2
7 0 100
11 10 10
-1 0 0
16 0 999
Data-Table
File Number
Starting
Element
Number Ending
Element
Number