Siemens CPU 948 User Manual

Interruptions
•• Program processing → STOP mode:
If an interruption occurs during program processing (e.g., multi-
processor stop, I/O not ready/STOP, error OB not programmed
etc.) before the program reaches the specified breakpoint, the CPU
goes into the STOP mode immediately. If you execute a COLD
RESTART or a MANUAL WARM RESTART, the "program test"
function is still in effect and the breakpoint is still set.
•• Program processing at breakpoint → STOP mode:
If stop conditions occur at the breakpoint or following breakpoint
during program processing, the CPU goes directly into the soft
STOP mode and outputs the data.
If you do not specify a new breakpoint while the CPU is in the
STOP mode, the "program test" function is still in effect after the
restart.
While the "program test" function is in effect, you can execute the
following other functions on your PG
- Output ISTACK
- Output BSTACK
- Load block
- Read block
- Delete block
- Output block list
- Force variables
- Force
In rare situations, the function may be terminated and the CPU is
subsequently in the STOP mode.
PG Functions
CPU 948 Programming Guide
C79000-G8576-C848-04
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Siemens CPU 948 Specifications

General

Brand	Siemens
Model	CPU 948
Category	Controller
Language	English