Siemens SIMATIC ET 200SP HA Panduan Peralatan - Halaman 41

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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 figure shows the mapping of the address space of the DI 8x24...125VDC HA with

time stamping (accuracy 1 ms).

IB x +

Meaning

DI7

DI6

QDI7

QDI6

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.

DI 8x24...125VDC HA

Equipment Manual, 10/2021, A5E39288633-AD

A.7 Address space of the time stamping (accuracy 1 ms)

DI5

DI4

QDI5

QDI4

Parameters, diagnostics messages and address space

DI3

DI2

QDI3

QDI2

DI1

DI0

QDI1

QDI0