Accessing The Distributed I/O - Siemens SIMATIC S5 Manual

S5-95U – addressing, accessing the distributed I/O and diagnostics with STEP 5

10.2 Accessing the distributed I/O

Access to Once you have assigned the inputs and outputs of the distributed I/O with
addresses
COM ET 200 Windows, you can use the STEP 5 application program to
access the inputs and outputs of the distributed I/O:
Access operations
The P-area is at your disposal for linear addressing. Table 10-2 shows the
operations you can use.
Table 10-2 Linear addressing with S5-95U as DP master
Inputs
I/O address
56 to 57
64 to 127
128 to 191
Outputs
I/O address
64 to 127
128 to 191
Data consistency
There are two consistent areas, I/O address 64 to 127 and 128 to 191. If these
areas overlap in a DP slave the result is data inconsistency: overlap must
therefore be avoided. The S5-95U recognizes data consistency for a DP
slave. If you specify module-granular consistency for a DP slave, the S5-95U
still treats the data consistently for the DP slave as such.
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
access addresses 127 via the process image
access addresses 128 via load and transfer operations
Address for direct
access
6338
6340
5700
Address for direct
access
63C0
5780
Access operations
to 6339
U E x.y / UN E x.y
H H
O E x.y / ON E x.y
L EB x
L EW x
to 637F
U E x.y / UN E x.y
H H
O E x.y / ON E x.y
L EB x
L EW x
to 573F L PY x
H H
L PW x
LIR TNB
Access operations
to 63FF
S A x.y
H H
= A x.y
T AB x
to 57BF
T PY x
H H
T PW x
TIR TNB
R A x.y
T AW x
10-3
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