Technical data

5.7.1
Control Bits
When you display the ISTACK on the PG the statuses of the control
bits are shown on the first screen page (see Fig. 5-1).
The control bits (>>STP<<, >>ANL<< and >>RUN<<) and the
control bits in the first lines of the first screen page mark the current
or previous status of the CPU and provide information about certain
features of the CPU and your STEP 5 program.
You can display the control bits in all modes. You can, for example,
make sure that organization block OB 2 is loaded and that interrupt
control program execution is possible at any time.
CONTROL BITS
>>STP<< STP-6
ANL-6
RUN-6 EINPROZ BARB OB1GEL FB0GEL OBPROZA OBWECKA
ANL-2 NEUZU MWA-ZULNEUSTA
X
XX
XXX
X
XX
MWA AWA
FE-STP BARBEND PG-STP STP-SCH STP-BEF MP-STP
>>ANL<<
>>RUN<<
32KWRAM
16KWRAM
URL-IA
FE-22
FE-6 FE-5 FE-4 FE-3 L Z F REG-FE DOPP-FE
PEU BAU ZYK QVZ ADF WECK-FESTUE-FE
MOF-FE RAM-FE DB0-FE DB1-FE DB2-FE KOR-FE
STP-VER ANL-ABB UA-PG UA-SYS UA-PRFE UA-SCH
8KWRAM KM-AUS KM-EIN DIG-EIN DIG-AUSEPROM
URGELOE
DX0-FE
NAU
BCF
Fig. 5-1 Example of the first screen form page "OUTPUT ISTACK": control bits
5
Control Bits and Interrupt Stack
CPU 928B Programming Guide
C79000-B8576-C898-01
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