Rockwell Automation 2706-ND1 DL40 OFFLINE PROGRAMMING SFTWR.USER MANUAL - Manual (Page 28)

Chapter 3
Installing the Software
3 – 2
available conventional RAM will be reported in bytes. Your system must
have 583,680 or more free bytes RAM to run the Offline Programming
Software and edit large application files.
With DOS versions 5.0 or higher, use CHKDSK
↵
or the MEM
↵
command to accomplish the same task. (The MEM
↵
commands reports
more quickly and in greater detail than does CHKDSK
↵
.) The value
reported for free conventional memory must be at least 570K.
The following table gives RAM recommendations for creating and editing
message files and requirements for using PassThrough. If your computer has
less than the required bytes free, reduce the number of memory resident
programs (communications programs, mouse drivers, etc.) your computer is
running. For additional information on increasing the amount of available
memory, refer to the configuration section of your computer’s DOS manual.
Table 3.A
PC memory requirements for typical activities
Function For a
CHKDSK
bytes free
Create and edit message files
DL40 with 16 or 32Kbyte
message memory
460,000 bytes
(recommended)
Create and edit message files
DL40 with 64Kbyte
message memory
500,000 bytes
(recommended)
Create and edit message files
DL40 with 128Kbyte
message memory
580,000 bytes
(recommended)
PLC–5 PassThrough w/DH+
PLC–5 with a DH+
Communications Interface Card
515,000 bytes
(required)
PLC–5 PassThrough w/Ethernet
PLC–5 with an Ethernet
Communications Interface Card &
FTP’s PC/TCP Software
515,000 bytes
(required)
Your PC’s system configuration at startup can affect the amount of RAM
available for use by the Offline Programming Software. DOS offers a
number of options that can help increase the amount of RAM available to
programs.
With DOS versions 5.0 or earlier you can maximize available RAM by
editing your
CONFIG.SYS file. Your CONFIG.SYS should contain text
lines similar the following:
DOS=HIGH, UMB
DEVICE=C:\DOS\HIMEM.SYS
BUFFERS=10
FILES=10
STACKS=9,128
In the example above, the BUFFERS, FILES, and STACKS values are set to
low values to conserve RAM for program operation.
Important: The line DOS=HIGH, UMB should be used only with DOS
versions 5.0 or higher.
Memory Management