Siemens SIMATIC S5 Manual page 178

Testing and Simulation with COM 265
10.2 On-Line Testing of the IP 265
The logically correct IP 265 user program can be tested on-line, i.e. in the IP 265 (under CPU
control and with process I/Os). COM 265 provides a special test function to support on-line testing.
The "On-line test" function makes it possible for testing of the IP 265 program to be controlled and
monitored via the programmer. You can
• forward control commands (RUN, STOP) to the IP 265 and read back status info from the IP 265
• influence input parameters and monitor output parameters.
Note
You can also monitor the local IP 265 inputs and outputs on the programmer screen
when they are interconnected as output parameters in the IP 265 user program.
Note
During an on-line test, the CPU (CPU user program) and COM 265 use the same
address space (PIQ/PII) to access the IP 265.
Prerequisites for an on-line test
• The IP 265's slot must have been set in COM 265's "Defaults" form
• The IP 265 user program (control of high-speed subprocess) must have been loaded in the
IP 265 via the I/O bus.
• The CPU user program (which controls the entire process) must have been loaded into the
CPU, and the CPU must be in RUN mode.
Starting an on-line test
Press the function key for "Online".
A table containing current parameter values is displayed on the monitor.
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IP 265
EWA 4NEB 812 6130-02a