Siemens SIMATIC S5 Manual page 90

Fundamentals of COM 265
: Editor
F1
COM 265 allows you to write the IP 265 application program in control system flowchart
(CSF) format, which is similar to the CSF format used in STEP 5 (for CPU program-
ming).
• A control system flowchart is a coherent formation of interdependent operations
such as logic operations, counter operations, comparison operations, and so on. In
addition to the familiar STEP 5 language elements, other language elements may
also be linked into in the IP 265 application program.
( Section. 9.3.2)
• In the flowchart, addressing of the operands for the IP 265 application program may
be either direct or symbolic.
• In addition to the control system flowchart, you may also enter comments for each
segment in the IP 265 application program (segment commentary).
• Background checking tasks are performed during entry of the IP program. For
instance, COM 265 reports errors in syntax or semantics on the message line,
prompting immediate correction.
: Compile
F2
Before it can be loaded into the IP 265, the IP 265 user program generated on the
programmer must first be compiled. (The terms 'application program' and 'user pro-
gram', as used here, are synonomous).
The IP 265 application program reserves memory space on the IP 265. During the
compiler run, checks are made to see whether the application program is translatable
and to make sure that there is sufficient room in the IP 265's memory.
: Test
F3
COM 265 provides extensive options for testing the IP 265 user program.
• Using the COM 265 simulator, the user can simulate most of the interconnections
in the IP 265 user program off-line, i.e. without PLC or IP 265.
• A second option allows on-line testing of the user program's logic under real-time
conditions (conditions for sub control of the overall system) in the PLC using
process signals. To enable this form of testing, the IP 265 user program must be
loaded into the IP 265.
• Independently of the IP 265 user program, you can also execute a wiring test in
order to check the interfaces to the process.
8-6
IP 265
EWA 4NEB 812 6130-02a