Siemens SIMATIC NET PROFIBUS Manuale Utente
Topologies of SIMATIC NET PROFIBUS Networks
2-20
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
2.5
Connectivity Devices
2.5.1
DP/DP Coupler
Uses
The PROFIBUS-DP/DP coupler is used to link two PROFIBUS-DP networks
together. Byte data (0 to 244 bytes) is transmitted from the DP master of a first
network to the DP master of another network and vice-versa.
together. Byte data (0 to 244 bytes) is transmitted from the DP master of a first
network to the DP master of another network and vice-versa.
This principle corresponds to the hardware wiring of inputs and outputs. The
coupler has two independent DP interfaces with which it attaches to the two DP
networks.
coupler has two independent DP interfaces with which it attaches to the two DP
networks.
The DP/DP coupler is a slave attached to the DP networks. The data exchange
between the two DP networks involves internal copying within the coupler.
between the two DP networks involves internal copying within the coupler.
Figure 2-13
DP/DP Coupler