Siemens S5-135U/155U appendix Channel number, Module, is given by

Analog Input/Output Modules

Press the individual rockers of the addressing switch downwards with a ballpoint pen or similar object, but not a pencil.

On Setting
(Switch Pressed)	Addressing Switch

Adresse (dezimal)

128	64	32	16	8	4	2	1
ADB7	ADB6	ADB5	ADB4	ADB3	ADB2	ADB1	ADB0

ADB0 and ADB1 are not assigned

ADB2 is not connected

Figure 9-14 Labeling of the Addressing Switch

Free Field for Label with Module Address and marked Switch Settings

Decimal Significance of

the Address Bit

Address Bit

	The address under which the module is referenced by the STEP 5 program is
	independent of the slot.
Start Address,	For analog input and analog output modules (4 inputs) only the lowest
Subaddress	address (start address) is set. Other addresses (subaddresses) are decoded on
	the module.
	Note
	The start address of the analog module must be a multiple of the double
	channel number.
	4 channels : 0, 8, 16, 24, ... 248
	If one of the inputs or outputs (Channel 0 to 3) of a module is to be
	addressed, the relevant subaddress must be specified in the program.
	The subaddress of the input or output, based on the start address of the
	module, is given by:
	Start address + 2 x channel no. = subaddress

9-40	System Manual
	C79000-G8576-C199-06