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6.2
Starting the Multiprocessor Operation
Procedure, overview
System Manual
C79000-B8576-C199-03
This section guides you through the installation and startup of
multiprocessor operation; the following is assumed:
• • You are familiar with the use and programming of individual
modules in single-processor operation. If this is not the case,
please consult the relevant chapters in this manual and in the
appropriate Programming Guides.
Note
As soon as a coordinator is inserted in the S5-135U/155U central
controller, all CPUs are automatically in multiprocessor operation
irrespective of the number of inserted CPUs.
Even if the coordinator is only operated with one CPU, the
conditions for multiprocessor operation apply to this CPU (DB 1
required, DX 0 possibly required, etc.).
You can use up to four CPUs in the S5-135U/155U programmable
controller. The permissible slots are indicated in Chapter 4.
Startup can be subdivided into the following steps:
Step
1
Set the number of CPUs (inserted from the left) on the
coordinator.
2
If you use communication flags on CPs:
Mask out the communication flag areas on the coordinator.
3
Insert the CPUs and the coordinator in the slots provided
in the central controller. The CC must be disconnected
from system voltage.
4
Switch on the system voltage and Power switch on the
power supply unit.
5
Execute an OVERALL RESET on all CPUs.
6
Load your STEP 5 user programs in all CPUs (including
DB 1, additionally DX 0 for the CPU 948).
7
Execute a RESET on all CPUs.
8
Set the mode switch of the coordinator from the STOP to
RUN or TEST setting.
Starting the Multiprocessor Operation
Action
6
6 - 5
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