Omron CJ - REFERENCE MANUAL 07-2009 Reference Manual page 75

FINS Commands with Host Link Protocol
CMND(490)
Number of Retries
Set the maximum number of times RECV(098) is to be resent if no re-
sponse is returned.
Response Monitor Time
Set the time to wait for a response
Control Word Settings
The setting range for each item is shown on the following table.
Item
Number of read words
Serial port number
Destination network
address
Destination node address 00:
Destination unit address
Response required/not
required
Communications port
number
Number of retries
Response monitor time
Note To execute RECV(098) normally, programming needs to be written to process
the command received by the host computer and return the proper data.
By using CMND(490), controls can be implemented by sending FINS com-
mands to the host computer.
Command Format Received by the Host Computer
CMND(490) can be used to send any FINS command to the host computer
The command format received by the host computer is shown in the following
diagram.
Setting
0001 to 010D (1 to 269 words)
00: CPU Unit, Inner Board, CPU Bus Unit
01: Port 1
02: Port 2
00: Local network
01 to 7F:Network address (1 to 127)
Internal communications in PLC
01 to FE: Node address of Ethernet Unit with model
number ending in ETN21 (1 to 254)
01 to 7E: Node address of Ethernet Unit with other
model number (1 to 126)
01 to 3E: Node address (1 to 62) for Controller Link
00: CPU Unit
10 to 1F: Serial Communications Unit (unit address 0 to
15)
E1: Inner Board (Serial Communications Board)
0: Response required
1: Response not required
0 to 7 (0 to 7)
0 to F (0 to 15)
0000: Default
0001 to FFFF: 0.1 to 6,553.5 s (unit 0.1 s)
Section 3-5
53