Siemens SIMATIC ET 200SP Manual - Page 19

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Parameters/address space

4.4 Address space

4.4
Address space
Configuration options of the DI 8×NAMUR HF
Configuration with value status:
● DI 8×NAMUR HF QI
Evaluating the value status
As a result of configuration with value status (QI), an additional byte is allocated in the input
address space. Each bit in this byte is assigned to a channel and returns information about
the validity of the digital value.
Deactivated channels or channels that are not operating correctly return a value status
of QI = 0.
With changeover contacts, the value status of a normally closed contact channel is always
QI = 0. The validity of the signal must be checked on the normally open contact channel.
Address space of the digital input module DI 8×NAMUR HF
The following figure shows the assignment of address space for the DI 8×NAMUR HF with
value status (Quality Information (QI)).
Figure 4-2
Technology functions
All technology functions, such as
● Pulse stretching
● Chatter monitoring
● Changeover error
● Hardware interrupt
require a valid input signal that returns QI = 1 (no diagnostics detected). Otherwise, they will
not run.
18
Address space of the DI 8×NAMUR HF digital input module with value status
DI 8xNAMUR HF digital input module (6ES7131-6TF00-0CA0)
Manual, 02/2014, A5E03894478-01