USER MANUAL APS 6.0

Preface
Advanced Programming Software User Manual
8–16
Memory Module Data File Overwrite
(SLC 5/03 and SLC 5/04 Processors)
Use the memory module data file overwrite protection with the memory module
autoload bits to retain values such as counter accumulators and sequencer positions
through a power cycle. Refer to the Instruction Set Refer ence Manual for more
information about the autoload bits. This type of protection allows you to autoload
your memory module and preserve retentive data.
The memory module data file overwrite protection only occurs when the program in
the processor matches the program in the memory module. If the programs do not
match, all memory module data files are transferred to the processor and bit S:36/10
“Memory Module Data File Overwrite Protection Lost” becomes set. Use minor
error bit S:36/10 to determine the validity of retentive data following the memory
module transfer.
The data table (memory map) screen allows you to view the type of protection
applied to data table files.
At the Program Directory display
, press
CONFIG
OFFLINE
CONFIG
MEMORY
MAP
F10
, then
CONFIG
OFFLINE
CONFIG
DATA
PROTECT
F10
. The following
display appears:
FILE TYPE LAST ADDRESS ELEMENTS WORDS FILE PROTECTION
0 O output O:2 1 1
1 I input I:3 2 2 STATIC MEM-MOD
2 S status S:82 83 83 STATIC MEM-MOD
3 B binary or bit B3/15 1 1 MEM-MOD
4 T timer T4:10 11 33
5 C counter C5:10 11 33 CONSTANT
6 R control R6:10 11 33 STATIC
7 N integer N7:255 256 256
8 F floating F8:0 1 2
PROCESSOR MEMORY LAYOUT
391 data words of memory used in 9 data table files
266 instruction words of memory used in 3 program files
3732 instruction words of unused memory available
Press a key to select protection
offline SLC 5/03 File EXAMPLE
DATA TABLE MAP
File 8 only applies to
SLC 5/03 OS301,
OS302 and SLC 5/04
OS400, OS401
processors.
F2 F3
CONST
PROTECT
REMOVE
PROTECT
F10
MEMMOD
UNPRTCT
F1
STATIC
PROTECT
F9
MEMMOD
PROTECT