Siemens S5-135U/155U appendix Starting the Multiprocessor Operation, Procedure, Overview, Voltage

Multiprocessor Operation/Coordinators

6.2Starting the Multiprocessor Operation

This section guides you through the installation and startup of multiprocessor operation; the following is assumed:

SYou 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.).

Procedure,	You can use up to four CPUs in the S5-135U/155U programmable controller.
Overview	The permissible slots are indicated in Chapter 4.
	Startup can be subdivided into the following steps:

Step

1

Action

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

4

Insert the CPUs and the coordinator in the slots provided in the central controller. The CC must be disconnected from system

voltage.

Switch on the system voltage and Power switch on the power supply unit.

5

6

Execute an OVERALL RESET on all CPUs.

Load your STEP 5 user programs in all CPUs (including DB 1, additionally DX 0 for the CPU 948).

7

8

Execute a RESET on all CPUs.

Set the mode switch of the coordinator from the STOP to RUN or TEST setting.

System Manual	6-3
C79000-G8576-C199-06