Address Space; Address Space Of The I/O Module Di 16Xnamur - Siemens SIMATIC ET 200SP HA Equipment Manual

Drivers, parameters, diagnostics messages and address space
A.6 Address space
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 figure shows the mapping of the address space of the DI 16×NAMUR HA.
Table A-1
IB x +
0
1
2
3
Evaluating value status
There is a bit value status (QI) 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 digital value cannot be detected due to an error.
• The digital input is disabled.
• The digital channel is configured as a NC channel
The validity of the signal must be checked on the NO channel.
50

Address space of the I/O module DI 16xNAMUR

7 6 5
DI7 DI6 DI5
DI15 DI14 DI13
QDI7 QDI6 QDI5
QDI15 QDI14 QDI13
4 3 2
DI4 DI3 DI2
DI12 DI11 DI10
QDI4 QDI3 QDI2
QDI12 QDI11 QDI10
Equipment Manual, 08/2019, A5E39293880-AD
1 0
DI1 DI0
DI9 DI8
QDI1 QDI0
QDI9 QDI8
DI 16xNAMUR HA