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S5-115U Manual
6.3
Handling Process Signals
Input/output module signal states can be read from or written to the addresses shown in
Figure 6-6.
F000
F07F
F080
F0FF
Absolute address
Figure 6-6. Addresses of the Input/Output Modules
Digital module signal states are also stored in a special memory area called the process image. The
process image has two sections, namely the process input image (PII) and the process output
image (PIQ). Figure 6-7 shows where the process images are located in the program memory.
EF00
EF7F
EF80
EFFF
Absolute address
Process signals can be read or output either via the process image or directly.
EWA 4NEB 811 6130-02b
H
Digital modules
H
H
Analog modules
H
H
PII
H
H
PIQ
H
Figure 6-7. Location of the Process Images
Addressing/Address Assignments
0
127
128
255
Relative byte addresses
0
127
0
127
Relative byte addresses
6-7
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