Siemens S5-135U/155U Manual De Usuario

9-10

System Manual

C79000-G8576-C199-06

You set the module address on the addressing switch. This also establishes
the necessary assignments between user program and process connection.
The module address is the sum of the decimal significances of the switch
rockers in the On setting (

Ĥ).

One data word = two data bytes is required to process an input or an output.
A module with 16 inputs therefore reserves 32 byte addresses, and a module
with 8 inputs or outputs reserves 16 byte addresses.

You can affix the adhesive label with the desired module address on a free
labeling field under the addressing switch.

The switch rockers to be set for the module address specified as a decimal
number (address bit ADB) are marked by dots on the label.

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

Address Bit

Decimal Signification of
the Address Bit

Free Field for Label with
Module Address and
marked Switch Settngs

Address (Decimal)

128

64

32

16

8

4

2

1

ADB7

ADB6

ADB5

ADB4

ADB3

ADB2

ADB2 is not connected

ADB1

ADB0

ADB0 and ADB1 are not assigned

Figure 9-3

Labeling of the Addressing Switch

The address under which the module is referenced by the STEP 5 program is
independent of the slot.

For analog input and analog output modules (8 inputs) only the lowest
address (start address) is set. Other addresses (subaddresses) are decoded on
the module.

Analog Input/Output Modules