Program Execution Levels - Siemens CPU 948 Programming Manual

Program Execution Levels

4.1

Program Execution Levels

Status
COMMUNICATION START-UP
SOFT
STOP
COMMUNICATION
START-UP
START-UP
TIMED INTERRUPTS
RUN
PROCESS INTERRUPTS/INTERRUPTS
CYCLE
Fig. 4-1 Program execution levels
4 - 4
Fig. 4-2 provides you with an overview of the program processing
levels in the various modes. The explanations of the abbreviations are
on the following page.
Program execution levels
Preparing for
communication
Cyclic processing
of communication
COLD RESTART
WARM RESTART
Time-controlled
program execution
Interrupt-driven
program execution
Cyclic program
execution
Error levels
ZYK
SUF
TRAF
ADF
QVZ
PARE
KB
KDB
FEDBX
SUF
TRAF
ADF
QVZ
PARE
KB
KDB
FEDBX
WEFES/WEFEH
ZYK
SUF
TRAF
ADF
QVZ
PARE
KB
KDB
FEDBX
CPU 948 Programming Guide
C79000-G8576-C848-04