Digital mode with time stamping (accuracy 1 ms)
The following tables show the assignment of the address space of the DI 8x24...125VDC HA
module in digital mode with time stamping (accuracy 1 ms).
Address space
The following gure shows the mapping of the address space of the DI 8x24...125VDC HA with
time stamping (accuracy 1 ms).
IB x + Meaning
0 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0
1 QDI7 QDI6 QDI5 QDI4 QDI3 QDI2 QDI1 QDI0
2 to 11 Time information for time stamping (accuracy 1 ms)
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.
Parameters, diagnostics messages and address space
A.7 Address space of the time stamping (accuracy 1 ms)
DI 8x24...125VDC HA
Equipment Manual, 10/2021, A5E39288633-AD 41
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