Siemens S5-135U/155U Selection Method, For the Serial, Interfaces, Switch, Slot Station No

Multiprocessor Operation/Coordinators

Selection Method	Station numbers are assigned to all the modules to be served by the
for the Serial	multiplexer in the unit. These numbers must be within the range 1 to 31
Interfaces	(decimal). You set the lowest of these numbers, the base address, with DIL
	switch S2 in binary code. The maximum of eight numbers are allocated to
	the slots of the PLC (see following table).
	All eight numbers or slots are assigned to switch S3: the lowest number to
	switch S3.1, and the highest number to switch S3.8. The setting of station
	numbers and the base address are described in more detail in Section 6.5.2.

Switch

S3.1

S3.2

S3.3

S3.4

S3.5

S3.6

S3.7

S3.8

Slot

11

27

43

59

75

83

91

99

Station No.

Base address Base address + 1 Base address + 2 Base address + 3 Base address + 4 Base address + 5 Base address + 6 Base address + 7

If slots are not occupied or if you wish to operate modules via their own front connectors, you must delete the numbers assigned to the corresponding slots with switch S3.

Note

For a module operated via the multiplexer, the front connector of the PG interface of the CPU must not be plugged in. With CPUs 948 and 928B, this only applies to the integrated PG interface SI 1.

6-22	System Manual
	C79000-G8576-C199-06