Siemens S5-135U/155U appendix Step, 923A Coordinator, 923C Coordinator

Multiprocessor Operation/Coordinators

	The individual actions are explained in more detail in the following.
Step 1	Setting the number of occupied CPU slots on the coordinator:
		923A Coordinator
	Number of CPUs used	Jumper(s) at EP 62
	2	7 - 10; 8 - 9 1)
	3	7 -10
	4	8 - 9
		923C Coordinator

Coded by inserting only one DIL switch S1.4, S1.5 or S1.6 in the front plate recess: (see Figure 6-2)

DIL S.

S1.1

S1.2

S1.3

S1.4

S1.5

S1.6

on

x

off

x x x

x x

Effect

±

±

Enable test mode

No. of occupied CPU slots = 2 1) No. of occupied CPU slots = 3 No. of occupied CPU slots = 4

1)Setting when delivered

Step 2 Setting the communication flag areas:

IF ...

THEN ...

you use communication flag areas on CPs (please consult the relevant manuals),

you must mask out these areas (blocks) on the coordinator without fail, to avoid duplicated addressing of the communication memory.

The 256 communication flag bytes can be masked out in groups of 32. You do this by removing jumpers at coding socket EP 7 on Coordinator A (see Figure 6-1 for location) or EP 60 on Coordinator C (see Figure 6-2).

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