Omron CS1W-CRM21 - Page 182

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Sending Explicit Messages Section 6-4
6-4-1 Sending Explicit Messages
When sending an explicit message to a CompoNet Slave Unit, the message is
sent to the CompoNet Master Unit using a FINS command (2802) as shown
below.
When sending an explicit message, send the FINS command to the Master
Unit at the local node, and not to the actual destination (the CompoNet Slave
Unit). The actual destination node address is specified in the command data
for the explicit message transmission command.
Example
Note Depending on the type of Slave Unit at the destination, a message may not be
received. Be sure to set retry processing.
CPU Unit
CMND
(See
note.)
Explicit
message
FINS
header
FINS
header
Note:
FINS
header
FINS
header
CompoNet Master Unit
Explicit
message
CompoNet Network
CompoNet Slave Unit
Response Response
FINS command
code 2802
Explicit
message
FINS command
PLC
CompoNet Slave Unit
CMND(490):
Control data (C+3):
Destination node address: 00 hex
Destination unit address: Unit number + 20 hex
Explicit
message
CompoNet Master Unit
Unit No. 2
PLC
CompoNet Input Slave Unit
Node address: 06
CMND
S
D
C
C + 3
00 2 2
15 8 7 0
15 8 7 0
Destination node
address: 00 hex
The destination node address in the
FINS command data is used as the
final destination node address.
Destination unit
address: 22 hex
28 0 2
16 0 6
S
S + 1
Final destination node
address: 1006 hex
Command code
Explicit command format