BECKHOFF C1120 - Manual (Page 9)

C1120 S5 to II/O Lightbus Interface Beckhoff II/O-Lightbus System
Date 27.06.97 Version 2.1 Page 9 of 52
C1120 Configuration
with this menu you can change the C1120 configuration to setup all necessary parameters for
the C1120 interface.
The field "S5-CommChannnel" describes the base address for the parallel channel functions
(see chapter "parallel channel" ). For use of more than one C1120 cards in one PLC the base
address default of 250 for the communication channel can be changed to an other address (
from address 128 - 250, length 6 Byte ). The address for status register will automatically
change to input value +4 and the address for interrupt request will change to input value +5.
A single request is able to access an II/O Lightbus module directly without synchronized
exchange with the process image (between read of input process image and output process
image write)*, by use of the STEP 5 commands "Load I/O process peripherials" e.g. "
Transfer I/O process peripherials ". Therefore, the base address "Address single request" of
an address block for the single request is to be defined between 128 and 250. By setting a "0"
for the base address "Address single request" the single request is disabled.
________________
* the PLC updates the Transfer Process Image automatically