Technical data

For monoprocessor PLCs, it makes sense to use only the base interface
number (refer to Fig. 4.4).
The link between the STEP 5 user program and a particular action on the
CP is the SSNR/ANR combination. To prevent the system reacting
incorrectly, an ANR must only be assigned once per connected CP. Fig. 4.5
illustrates the relationship between a STEP 5 user program and the
parameter set on the CP.
CPU
0123 4567
base SSNR 0 base SSNR 4
CP 1
CP 2
Monoprocessor PLCs
. . .
base SSNR 8
base SSNR 248
pointless
Fig. 4.4 Interface Addressing with a Monoprocessor PLC
Technical Description and Installation of the CP 5430 TF/CP 5431 FMS B8976060/02
Volume 1 4 - 10