Address Space - Siemens SIMATIC ET 200SP Manual

Parameters/address space

4.4 Address space

Potential group
A potential group consists of a group of directly adjacent I/O modules within an ET 200SP
station, which are supplied via a common supply voltage.
A potential group begins with a light-colored BaseUnit through which the required voltage is
supplied for all modules of the potential group. The light-colored BaseUnit interrupts the
three self-assembling voltage buses P1, P2 and AUX to the left neighbor.
All additional I/O modules of this potential group are plugged into dark-colored BaseUnits.
You take the potential of the self-assembling voltage buses P1, P2 and AUX from the left
neighbor.
A potential group ends with the dark-colored BaseUnit, which follows a light-colored
BaseUnit or server module in the station configuration.
See also
You can find additional information in the system manual ET 200SP distributed I/O system
(http://support.automation.siemens.com/WW/view/en/58649293).
4.4 Address space
Configuration options
The following configurations are possible:
● Configuration 1: Without value status
● Configuration 2: With value status
Evaluating the value status
If you enable the value status for the analog module, an additional byte is occupied in the
input address space. Bits 0 to 1 in this byte are assigned to a channel. They provide
information about the validity of the analog value.
Bit = 1: There are no errors on the module.
Bit = 0: Channel is deactivated or there is a fault on the module.
If a fault occurs on a channel with this module, the value status for all channels is 0.
18
Analog input module AI 2xI 2/4-wire ST (6ES7134-6GB00-0BA1)
Manual, 12/2015, A5E36104399-AA