Siemens SIMATIC ET 200AL, System Manual

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Parameters/address space
4.5 Address space
Analog input module AI 4xRTD/TC 4xM12 (6ES7144-5KD50-0BA0)
Equipment Manual, 08/2021, A5E48753535-AB
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4.5 Address space
The figure below shows the assignment of the address space for the AI 4xRTD/TC 4xM12
analog input module with value status (Quality Information, QI). If you are using PROFINET
and the value status has been enabled, the addresses for the value status are available. The
value status is not available for PROFIBUS.
Figure 4-3 Address space
Configuration options of the AI 4xRTD/TC 4xM12 analog input module
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, then a byte is additionally
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:
•
Channel is deactivated
• Incorrect wiring
• Applied value at channel is incorrect