Process Image And Access To I/Os - Siemens SIMATIC S5-90U System Manual

S5-90U/S5-95U
6.3

Process Image and Access to I/Os

The process input image (PII) includes information on inputs; information on outputs is written into
the process output image (PIQ).
The PII and the PIQ occupy 128 bytes each in the RAM of the PLC.
I/O Areas and their Addresses in the Process Image of the S5-90U
Table 6-2. S5-90U: Structure of the PII and PIQ
Process Input Image (PII)
Address
in PII
0.0 to 5.7 Digital inputs of the external
I/Os
6.0 to 31.7 Unassigned
32.0 to 33.1 Digital inputs of the onboard
I/Os
33.0 Interrupt input
33.1 Counter input
33.2 to 34.7 Unassigned
35.0 to 35.4 Diagnostic byte
36.0 to 37.7 Counter
38.0 to 39.7 Internal assignment
40.0 to 63.7 Unassigned
64.0 to 127.7 Analog inputs of the external
I/Os
EWA 4NEB 812 6115-02b
Assignment
Addressing and Access to I/Os
Process Output Image (PIQ)
Address
in PIQ
0.0 to 5.7 Digital outputs of the external
I/Os
6.0 to 31.7 Unassigned
32.0 to 32.5 Digital outputs of the onboard
I/Os
from 32.6 Unassigned
Unassigned
Unassigned
Unassigned
up to 37.7 Unassigned
38.0 to 39.7 Internal assignment
40.0 to 63.7 Unassigned
64.0 to 127.7 Analog outputs of the external
I/Os
Assignment
6-9