Address Space; A.6 Address Space - Siemens SIMATIC ET 200SP HA Manual

A.6

Address space

Abbreviations
● "IB" stands for input byte, that is, the module start address in the input area
● "DI" stands for digital input
● "QDIn" stands for the value status (QI) of digital input n
Address space
The following figures shows the assignment of the address space of the DI 8×24...125VDC
HA.
IB x + Meaning
0 DI7 DI6
1 QDI7 QDI6
Evaluating the value status
There is a bit value status for each digital input in the input address space.
Irrespective of the diagnostics enables, each value status (each QI bit) provides information
on the validity of the corresponding process value.
● Value status = 1: Process value okay, "good"
● Value status = 0: Process value not okay, "bad"
Basically, the value status is set to "good" if the digital value can be detected without error.
The value status is set to "bad" in the following cases:
● The process value cannot be recorded due to an error.
● The digital channel is deactivated.
Note
The value status is not set to "bad" when there is a wire break on the channel and the wire
break test is disabled.
Digital input module DI 8x24...125VDC HA (6DL1131-6DF00-0PK0)
Manual, 11/2017, A5E39288633-AB
Drivers, parameters, diagnostics messages and address space
[ID: 80184647691]
DI5 DI4
QDI5 QDI4
DI3 DI2
QDI3 QDI2

A.6 Address space

DI1 DI0
QDI1 QDI0
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