Siemens S5-135U/155U - Manual (Page 326)

8-14
System Manual
C79000-G8576-C199-06
8.2 Installation and Startup
This section describes how to prepare digital input/output modules for
installation, and how to install and wire them.
8.2.1 Setting the Module Address
You set the module address on the addressing switch. This also establishes
the necessary assignments between user program and process connection.
The address of the digital input modules (input bytes IB 0 to 255 or 252 for
the DI/DQ 482) and digital output modules (output bytes QB 0 to 255 or 252
for the DI/DQ 482) is the sum of the binary significances established by
depressing the individual rockers in the On setting (
l).
The modules are addressed by the STEP 5 program under their parameters
(byte address).
You can affix the adhesive label with the desired module address on a
labeling field under the addressing switch. Suitable labels are supplied with
the CC.
The switch rockers with which the module address (IB n or QB n) is
specified as a decimal number, are marked by dots on the label.
Do not use a pencil to set the addressing switch.
Labeling Field
Digital Input/Output Modules