Bosch Rexroth Rho 4.0 - Page 67

Electric Drives
and Controls
4−3Bosch Rexroth AGRhoMotion1070072367 / 04
PCLrho4.0
Data channel
In addition to the transmission of signalling information (bit level), data
which can be accessed from BAPS can be exchanged with the PLC.
For this, there must be access to the data from BAPS.
In addition to the rho4 interface, the rho4.0 has its own data channel,
which is able to transmit larger quantities of data from/to the PLC (READ/
WRITE PLC).
The TCP/IP server used with the rho4.0 is also used at the Ethernet con-
nection to implement this data channel. The server packages data into
protocol blocks and sends them to the PLC destination station. The follo-
wing figure shows the data flow between the rho4 and PLC over the TCP/
IP data channel.
rho4.0
BAPS
PCLrho4.0
to the PLC
Ethernet
TCP/IP
TCP/IP server
(data ex-
change)
TCP/IP server
(data ex-
change)
rho4.0
Interface
(bit level)
rho4.0
Interface
(bit level)