Omron C200HW-CORT21-V1, Руководство по эксплуатации

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Input and Output Data
Section 4-1
48
4-1 Input and Output Data
Link between 2 buses
The C200HW-CORT21-V1 forms a link between two bus systems: the host
PLC's I/O bus on one side, and the CANopen network on the other. The Unit
can be considered as a slave to both systems: the I/O bus communication is
controlled by the CPU of the host PLC, the CANopen communication is
controlled by the CANopen NMT master.
Definition
Being a slave to two systems may cause confusion as to which data should
be considered 'input data' and which is 'output data'.
In this manual all I/O data communication is defined from the point of view of
the CANopen network. When configuring the CANopen network, the
C200HW-CORT21-V1 will be considered as an I/O 'slave' unit. Instead of
having physical input and output signal connections, it exchanges its I/O data
with the host PLC.
INPUT Data INPUT Data is process data which the C200HW-CORT21-V1 transmits onto
the CANopen network. The Unit reads the input data from the mapped PLC
areas during the PLC's I/O refresh. The moment of transmission to other
CANopen nodes depends on the configured transmission type.
OUTPUT Data
OUTPUT Data is process data which the C200HW-CORT21-V1 receives
from the CANopen network. The Unit writes the output data to the mapped
PLC areas during the PLC's I/O refresh. If the transmission type of a receive
PDO is set to synchronous, the data of the respective PDO is only
transferred to the PLC after the reception of the configured SYNC Object.
Asynchronous PDO data is always immediately transferred to the PLC at the
time of the next I/O refresh.
CANopen
Node
I/O Bus
C200HW-
CORT21
INPUT Data
Host PLC
CANopen
Network
CANopen
Node
CANopen
Network I/O Bus
C200HW-
CORT21
OUTPUT Data
Host PLC