Siemens S5-155U System Manual page 384

The 460 Analog Input Module
9.3.4
Setting the Module Address You set the module address on the addressing switch. This also
Labelling field
Start address, subaddress
9 - 12
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 (• • ).
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 labelling 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)
Address (Decimal)
ADB0 and ADB1 are not assigned
ADB2 is not connected
Figure 9-3 Labelling 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.
Addressing Switch
Free Field for Label
with Module Address
and marked Switch
Settings
Decimal Significance
of the Address Bit
Address Bit
System Manual
C79000-B8576-C109-03