Technical data

MANUAL WARM RESTART
after aborting a RESTART
If the CPU goes to the STOP mode during any RESTART (stop
switch of ADF) and you then trigger a MANUAL WARM
RESTART, the interrupted RESTART is continued from the point at
which it was interrupted. OB 21 is not activated.
MANUAL COLD RESTART
after aborting a RESTART
If the CPU goes to the STOP mode during any RESTART and you
then trigger a MANUAL COLD RESTART, the interrupted
RESTART is aborted and a COLD RESTART is performed (if it
exists, OB 20 is called).
Aborting RETENTIVE
COLD RESTART
RETENTIVE COLD RESTART is aborted by:
•• Power failure in the central controller (NAU) or in the expansion
unit (PEU),
•• Stop switch, stop command, MP-STP or PG-STP
or
•• Program errors and hardware faults (see Section 5.6).
An aborted RETENTIVE COLD RESTART is not continued at warm
restart. Instead, a new RETENTIVE COLD RESTART is started.
Previous events and statuses are not taken into account in the selection
of restart type. The following applies especially:
•• If a MANUAL or AUTOMATIC RETENTIVE COLD RESTART
is aborted by POWER OFF or power failure in the expansion unit,
a RETENTIVE AUTOMATIC COLD RESTART always takes
place at POWER ON if all other restart conditions are met.
•• If a MANUAL or AUTOMATIC RETENTIVE COLD RESTART
is initiated by one of the other abort types, a new RETENTIVE
MANUAL COLD RESTART takes place.
RESTART Mode
CPU 928B Programming Guide
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