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Sending Explicit Messages Section 6-4
6-4-1 Sending Explicit Messages
The FINS command code 28 01 can be used to send explicit DeviceNet mes-
sages to OMRON slaves and DeviceNet devices made by other manufactur-
ers. The use of explicit messages is illustrated in the following diagram.
The local DeviceNet Unit is specified as the destination in the communica-
tions instruction in the PC’s user program (not the OMRON Special Slave or
DeviceNet device made by another manufacturer), and the node address of
the actual destination (i.e., the Slave or Master made by another manufac-
turer) is specified in the command data for the explicit message send com-
mand.
CPU Unit
CMND
(490)
Explicit
message
FINS
header
Use 28 01 for the
FINS command code.
FINS
header
Response
DeviceNet De
viceNet Unit
FINS
header
FINS
header
Explicit
message
Response
DeviceNet
network
Slave or Master
by other
manufacturer
FINS command
PC's
CPU Unit
Explicit message
Slave or Master
not by OMRON
CMND
Control data in C+3
Destination node address: Local node address
Destination unit address: Unit No. of DeviceNet Unit +10 ( Hex)