Function description
Operating Manual PSSu E S 2AI I se(-T)
21417-EN-04
21
Configurable properties
Default
value
Meaning
ADC initialisation value
4096
D
4096
D
(1000
H
) is issued when no data is detected.
4.3.6
PSSu assignment in system environment A
4.3.6.1
Addresses in the process image
Each input occupies 16 consecutive bit addresses for the input data. Each input occupies
an additional 8 consecutive bit addresses for the status byte, where this has been con-
figured for the input. If the status byte is configured to be transferred without input data,
each input occupies 8 consecutive bit addresses. All the status bytes are displayed first in
the PII, followed by the input data.
Configuration
Standard bus system
ST-PII
ST-PIO
Send input data
32 Bit
- - -
Send status byte ("R")
16 Bit
- - -
Bit sequence in the PII, input data only, no status byte:
Input
PII
Assignment
Input I0
1
LSB input data
...
...
16
MSB input data
Input I1
17
LSB input data
...
...
32
MSB input data
Bit sequence in the PII, input data and status byte:
Input
PII
Assignment
Input I0
1
LSB status byte
...
...
8
MSB status byte
Input I1
9
LSB status byte
...
...
16
MSB status byte
Input I0
17
LSB input data
...
...
32
MSB input data
Input I1
33
LSB input data
...
...
48
MSB input data
