Bosch Rexroth Rho 4.0 - Page 68

4−4 Electric Drives
and Controls
Bosch Rexroth AG RhoMotion 1070072367 / 04
PCLrho4.0
Programming the data channel to the PLC coupling
Programming via the data channel does not depend on the type of cou-
pling for the Ethernet/system bus. The OEM only programs the type of
data to be transmitted. The data from the rho4.0 can be read out or writ-
ten in on the PCLrho4.0, depending on the data block number entered in
BAPS, see example.
The following figure shows the basic operation of the PLC data channel.
WRITE/READ
BAPS
PLC
[Data]
Sequentializing and
synchronization in
blocks
rho4 operating sy-
stem
PCL OEM PLC
Processing
Synchronization
into PLC data block
Application
PLC data channel
reads or writes
data from a data
block
BAPS example program for access to PLC data via PLC data channel
; .
RECORD ;Record declaration in declaration part
INTEGER : LENGTH ;Data length of data buffer to be transferred
INTEGER : DM_NO ;Data module No. of PLC
REAL : REAL_VALUE ;Components of record
POINT : PNTVAR
INTEGER : INTEGERVAR
; .
; .
RECORD_END: READ_RANGE ;Declaration of record variables
RECORD ;Declaration of record
INTEGER : LENGTH ;Data length of data buffer to be transferred
INTEGER : DM_NO ;Data module No. of PLC
INTEGER : IVAR ;Components of record