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4.4

Address space

The figure below shows the assignment of the address space for the analog input module

AI 4xU/I/RTD 4xM12 with value status (Quality Information, QI). If you are using PROFINET

and the value status was enabled, the addresses for the value status are available. The

value status is not available for PROFIBUS.

Figure 4-2

Configuration options of analog input module AI 4xU/I/RTD 4xM12

You have the following configuration options:

● Configuration 1: without value status

● Configuration 2: with value status

Evaluating the value status

If you enable the value status for the analog input module, a bit is also assigned in the input

address space. Bits 0 to 3 in this byte are assigned to a channel and provide information on

the validity of the analog value. The value status is independent of whether or not

diagnostics was configured.

Bit = 1: No error on channel.

Bit = 0: Error on channel.

Analog input module AI 4xU/I/RTD 4xM12 (6ES7144-5KD00-0BA0)

Manual, 08/2018, A5E32350124-AD

Address space

Parameters/address space

4.4 Address space