Pilz PSSu E S 2AI U - Manual (Page 23)

Function description
Operating Manual PSSu E S 2AI U(­T)
21405­EN­03 23
4.2.8 PSSu assignment in system environment A
4.2.8.1 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
ST­PII ST­PIO
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
Bit sequence in the PII, status byte only, no input data: