Omron E5EK DEVICENET User Manual page 102

CHAPTER 6 USING CompoBus/D (DEVICENET)
6.1 Outline of CompoBus/D (DeviceNet)
J Communications
defaults
J Data
assignments
About Writing
Communication
Data
6--2
The E5EK-DRT operates as a slave on the CompoBus/D (DeviceNet)
network.
The remote I/O functions of the E5EK-DRT allow data to be received
and sent automatically between the master and the slave.
The following shows the communications procedure when the E5EK-
DRT is used as a slave on the CompoBus/D (DeviceNet) network.
Setting Up Communication Conditions
Baud rate, Node address
Communication data format
Operation at communication error
Assigning Communication Data
Parameters
Operation instructions
Status
Remote/local switching
For details on how to the turn the master and slaves ON, and the I/O
tables on the master, see the CompoBus/D (DeviceNet) Operation
Manual (catalog No.: W267).
On the E5EK-DRT, the communication data type must be assigned to
the read/write areas with the master. Up to 16 channels can be used as
read or write areas. The data of each of these channels is assigned in the
"write data assignments 1 to 16" and "read data assignments 1 to 16"
parameters.
Unused channels can also be specified. This is useful in securing
reserved area for data type, and reducing the number of channels.
For details on how to assign data, see 6.4 Data Assignments (page
6---8).
The E5EK-DRT is set to the local mode before shipment from the factory.
Writing of communication data is enabled only in the remote mode. So, before
you assign communication write data, be sure to switch the E5EK-DRT to the
remote mode.
Operations on E5EK-DRT
¯ Set the same baud rate on the entire
network.
¯ Set node addresses so that they do
not conflict with other devices on the
network.