B.3 Access Commands For The 945 Cpu - Siemens SIMATIC S5 Manual

Access commands for the S5-115U, S5-135U and S5-155U programmable controllers

B.3 Access commands for the 945 CPU

Linear addressing
P-page addressing
B-6
When you use linear addressing for the 945 CPU, you can access both the P
area and the Q area:
Table B-5 Linear addressing with the 945 CPU
Inputs
I/O address
0 to 127
(P area)
128 to 255
(P area)
0 to 255
(Q area)
Outputs
I/O address
0 to 127
(P area)
128 to 255
(P area)
0 to 255
(Q area)
If you choose P-page addressing, you must use PY 255 (F0FF
selection address.
Table B-6 P-page addressing with the 945 CPU
Inputs P , P , ..., P
n n+1 n+15
I/O address Address for direct access Access commands
192 to 254 F0C0
Outputs P , P , ..., P
n n+1 n+15
I/O address Address for direct access Access commands
192 to 254 F0C0
Address for direct Access commands
access
0F000 to 0F07F
A I x.y / AN I x.y
H H
O I x.y / ON I x.y
L IB x
L ID x
0F080 to 0F0FF L PY x
H H
0F100 to 0F1FF
L QB x
H H
Address for direct Access commands
access
0F000 to 0F07F
S Q x.y
H H
= Q x.y
T QB x
T QD x
0F080 to 0F0FF
T PY x
H H
0F100 to 0F1FF
T QB x
H H
(n = 0, 16, 32, ..., 240)
to F0FE
L PY x
H H
(n = 0, 16, 32, ..., 240)
to F0FE
T PY x
H H
L IW x
L PY x
R Q x.y
T QW x
T PY x
) as the page
H
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a