Siemens S5-135U/155U User Manual
Page 485
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