Phoenix Contact INTERBUS - Integrating INTERBUS Data into the PLC

16 5756B
Integrating INTERBUS Process Data
Into the PLC
Driver blocks enable the transfer of the area of INTERBUS
process data (input and output data of INTERBUS devices) to
the S7-300 PLC. These driver blocks create a process image
that reads the inputs prior to the application program and
writes the outputs to the controller board or output devices
after they were processed by the application program.
Figure 16 Addressable areas in the SIMATIC
®
S7-300 PLC
Driver blocks can transfer INTERBUS data into the
I/Q area of the PLC, into bit memory areas and into data
blocks, or out of these areas.
Further information on the configuration of driver
blocks and the settings required in STEP 7
®
and
IBS CMD SWT G4 can be found in the following
sections or in the IBS S7 300 DSC SWD UM E Driver
Manual (Order No. 27 43 25 5).
5770B013
Data block
Bit memory area
I/Q area
INTERBUS
m ax. 512 output
bytes
IN T E R B U S
(process im age)
area
input area
output area
(m ax. 512 input
bytes)