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
DI5
DI4
DI3
DI2
DI1
DI0
1
QDI7
QDI6
QDI5
QDI4
QDI3
QDI2
QDI1
QDI0
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.
A.7
Address space of the time stamping (accuracy 1 ms)
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
Parameters, diagnostics messages and address space
A.7 Address space of the time stamping (accuracy 1 ms)
DI 8x24...125VDC HA
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Equipment Manual, 10/2021, A5E39288633-AD
