Ip 265 User Program Load On The Ip 265 - Siemens SIMATIC S5 Manual

IP 265
Once the compilation run has been started, COM 265 handles the run autonomously. A compilation
takes place in three phases:
• Phase A: Placing the COM 265 language elements
• Phase B: Interconnecting the COM 265 language elements
• Phase C: The resulting IP 265 user program is translated into data relevant to the IP 265
The phase currently executing is displayed on the monitor.
Errors
If the IP 265 user program cannot be compiled, COM 265 aborts the compilation prematurely and
displays an error message on the monitor screen. You can press <F7> "Info" to screen a Help
window which provides information on the cause of error and recommendations on how it can be
rectified.
Some examples of error messages displayed by COM 265:
• "The IP265 program is too long!"
• "Illegal connection of the comparator in segment "3""
• "The IP265 program has not yet been generated (blank program)"
To allow quick corrections, you can go straight from the compiler to the editor ( Section 9.6.2).
Result message
If the IP 265 user program was free of errors and not too big, the following message is displayed
when the compilation has been successfully completed:
"Program has been compiled without error, and utilizes xx% of the IP's capacity."
The value 'xx%' shows how much of the IP 265's capacity is taken up by the IP 265 user program.
9.5.1

IP 265 User Program Load on the IP 265

Remember
The IP 265's program capacity is limited. The IP 265 user program load on the IP 265 is dependent
on two factors:
• The amount of memory needed for the COM 265 language elements in the IP 265 user program
• The interconnection of the COM 265 language in the IP 265 user program
Table 9-13 provides an overview of the load (in %) placed on the IP 265 by the various COM 265
language elements and their interconnection. This table will help you estimate whether your IP 265
user program can be compiled, or whether it is too big for the amount of space available in the IP.
The capacity load display in COM 265's "Editor" form is based on this table.
EWA 4NEB 812 6130-02a
Programming the IP 265 with COM 265
9-49