Technical data

Lines 4 and 5 (CONTROL BITS)
Control bit Meaning
DIG-AUS
Address list for digital outputs exists
Table 5-4 continued:
URGELOE
Overall reset performed on CPU (COLD RESTART
required)
URL-IA
Overall reset being performed on CPU
STP-VER
CPU caused CP stop
ANL-ABB
RESTART aborted (COLD RESTART required)
UA-PG
PG has requested OVERALL RESET
UA-SYS
System program has requested OVERALL RESET (no
RESTART possible); OVERALL RESET must be
performed
UA-PRFE
OVERALL RESET requested owing to CPU error
UA-SCH
OVERALL RESET requested at hardware switch:
perform an OVERALL RESET or select a restart
type if you do not want to perform the requested
OVERALL RESET
The control bits in the following table indicate errors that can occur in
the RESTART (e.g. during an initial COLD RESTART) and RUN
(e.g. during time-driven program execution) modes.
If several errors occur,
all causes of interruptions that have occurred
up to now (and have not yet been processed) are displayed in the last
three lines of the control bits.
See also system data word RS 2, this
contains the ICMK (interrupt condition code group word, 16 bits), in
which all errors not yet processed are also entered (Section 8.3.5).
5
Control Bits and Interrupt Stack
CPU 928B Programming Guide
C79000-B8576-C898-01
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