Memory concept
6.2 Memory functions
Sample application
When you assign more than one member of your service and maintenance department to
perform maintenance tasks on a SIMATIC PLC, it may prove difficult to provide quick access
to current configuration data to each staff member.
However, CPU configuration data available locally on any CPU that is to be serviced can be
accessed by any member of the service department. They can edit these data and then
release the updated version to all other personnel.
6.2 6.2 Memory functions
6.2.1 Downloading the user program
Introduction
Memory functions are used to generate, modify or delete entire user programs or specific
blocks. You can also ensure that your project data are retained by archiving these.
General: Download a user program from PG/PC
All user program data are downloaded from your PG/PC to the CPU via MMC.
Blocks use the load memory area as specified under "Load memory requirements" on the
"Blocks" tab under "Properties - block container offline".
You cannot run the program until all the blocks are downloaded.
MMC CPU
3*
6WRUHGRQKDUGGLVN
/RDGPHPRU\ :RUNLQJPHPRU\
&RGHEORFNV &RGHEORFNV
'DWDEORFNV 'DWDEORFNV
&RPPHQWV
6\PEROV
'\QDPLFVHFWLRQV
RIFRGHDQGGDWD
EORFNV
Figure 6-3 Load and working memory of the Technology CPU
* The technology system data are a component of the data blocks.
** If not alI the working memory area is retentive, its retentive area is indicated in the STEP 7
module status as retentive memory.
S7-300 CPU Data: CPU 315T-2 DP
6-10 Manual, 12/2005, A5E00427933-02
To Next Page
Loading...
Need help?
General
