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Siemens S5-135U/155U User Manual

Page 485

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9-103

System Manual
C79000-G8576-C199-06

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

Note

The start address of an analog module must be a multiple of the double
channel number.
8 channels : 0, 16, 32, 48, ... 240

If one of the outputs (Channel 0 to 7) of a module is to be addressed, the
relevant subaddress must be specified in the program.

The subaddress of the output, based on the start address of the module, is
given by:

Start address + 2 x channel no. = subaddress

Example:

Analog output module with 8 outputs

The address is the sum of the significances set with the individual coding
switches.

160 = 128 + 32 = 2

7

+ 2

5

On Setting
(Switch Pressed)

IB 160

128

64

32

16

8

4

2

1

ADB7

ADB6

ADB5

ADB4

ADB3

ADB2

ADB1

ADB0

A module with 8 outputs (Channel 0 to 7) and start address 160 reserves the
address range from

160 to address 160 + 7 x 2 = 174

In this example, the next free address for another module is 176.

Addresses already assigned must not be set again.

Start Address,
Subaddress

Analog Input/Output Modules