Siemens CPU 948 User Manual

COLD RESTART WARM RESTART
Table 4-3 continued:
System
program
activities
(continued):
Set system parameters according to the
settings in DX 0
DX 0 not evaluated
Call user interface OB 20
(if it exists)
1)
Call user interface OB 21/22
(if they exist)
1)
Synchronize start-up in multiprocessor
operation
Synchronize start-up in multiprocessor
operation
Transition to the cycle:
- switch BASP inactive,
- call OB 1
Transition to the cycle:
- BASP remains active
- delete process image of the outputs
- process remaining cycle
- switch BASP inactive
- call OB 1
1)
Following POWER UP, the user interfaces are called in the following order during the START-UP:
OB 38, OB 39, OB 20/OB 22.
4.3.4
RETENTIVE COLD
RESTART
If the parameter for a "cold restart with memory" is stored in the
loaded DX 0 block, the system program goes through a RETENTIVE
COLD RESTART instead of a WARM RESTART. How this differs
from a "normal" COLD RESTART can be seen in the following
section.
START-UP Mode
CPU 948 Programming Guide
4 - 22 C79000-G8576-C848-04

Siemens CPU 948 Specifications

General

Brand	Siemens
Model	CPU 948
Category	Controller
Language	English