Technical data

PLC 2
➣
DW 1 is incremented in DB 20.
➣
After DW 1 has been incremented in DB 20, this is transmitted to PLC 1
using HDB SEND.
➣
HDB SEND is assigned the values ANR=1 and SSNR=4.
➣
PLC 2 has the L2 address 2.
➣
The data sent from PLC 1 are received in PLC 2 and stored in DB 22.
➣
HDB RECEIVE is used for this. The HDB is assigned the values
A-NR=101 and SSNR=4.
RS485 RS485
C
P
U
1
C
P
U
2
C
P
1
C
P
2
PLC 1
PLC 2
SAP
2
SAP
3
Send-ANR 1
RECEIVE-ANR 101
DB 10
DB 22
SSNR 0
SSNR 4
DW 1
L2 add 1 L2 add 2
L2
DW 1
DB 12
DB 20
DW 1 DW 1
Fig. 7.11 System Configuration for the Example of Data Transmission with HDBs
S5-S5 Communication B8976060/02
Volume 1 7 - 18