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Overview
11.1 Overview
11 - 4
You can load and test your user program using the online functions of
the STEP 5 software.
To use these functions, the CPU must be connected to the PG. The
following interfaces are available for this link:
• • link via the serial standard interface "PG - PLC",
• • link via the 2nd serial interface of the CPU 948,
• • link via the S5 bus with SINEC H1.
The PG functions can operate simultaneously on the two serial
interfaces, however, via the SINEC H1 link, the PG functions can only
be used alternately with those on the serial interfaces
PG functions provide the following support for installing and testing
your STEP 5 program:
Table 11-1
Functions for installation and testing
Function
Size of the internal RAM and free
user memory
List of loaded blocks
Display contents of memory
words/bytes and I/O bytes
Delete the whole memory
Create more memory space
Manage blocks
Start/stop CPU
Test the operation sequence in a
block
Test single program steps
Display signal state of process
variables
Output signals in the stop mode
Display/change process variables
Info
"Memory configuration"
"Output DIR"
"Output address"
Memory management
"Overall reset"
"Compress memory
"Transfer/delete blocks"
Program test
"Start/stop"
"Status block"
"Program test"
"Status variables"
"Force"
"Force variables"
CPU 948 Programming Guide
C79000-G8576-C848-04
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