Siemens SIMATIC S5 Manual page 76

Startup, Loading and Operating States
On-line test
The IP 265 user program is tested on the module in order to check IP 265 program execution.
COM 265 provides convenient access to the address area of the IP 265 in the PIQ and PII of the
CPU.
With COM 265, the user can "write" and "read"
• the required operating state in the control word of the module
• the status information in the status word of the module
• input parameters of the IP 265 user program
• output parameters of the IP 265 user program
Storing
There are two ways of storing the IP 265 user program on a memory submodule:
• Direct at the programmer (E(E)PROM memory submodule plugged into programmer)
or
• Indirect in the module (EEPROM memory submodule plugged into IP 265. IP 265 is loaded via
the remote I/O bus)
Notes
In addition to starting up the IP 265, you must program that section of the CPU user program which
controls IP 265 program execution. During generation of the IP 265-relevant section of the CPU user
program, some important principles must be taken into account to ensure correct operation of the
IP 265.
Programming of the control of IP 265 program execution is therefore treated in a separate section of
this manual ( Section 6 "Control of the IP 265 by the CPU User Program").
Note
The CPU user program is generated and tested in STEP 5 at the programmer/PC.
Note
The "FORCE VAR" PLC function of the STEP 5 package also provides access to the
PIQ and PII of the IP 265.
For startup of the IP 265, IP 265 program execution can also be controlled with the aid
of this PLC function.
7-4
IP 265
EWA 4NEB 812 6130-02a