55
FINS Commands with Host Link Protocol Section 3-5
Number of Retries
Set the maximum number of times CMND(490) is to be resent if no re-
sponse is returned.
Response Monitor Time
If the Response Setting is set to require a response, set the response mon-
itor time.
Note If response data longer than that set in the Number of Bytes of Response
Data is returned, all extra response data will not be stored. If response data
shorter than that set in the Number of Bytes of Response Data is returned,
the response data will be stored, and the remaining area will stay at its previ-
ous values.
Control Word Settings
The setting range for each item is shown on the following table.
Note To execute CMND(490) normally, programming needs to be written to process
the command received by the host computer and return the proper response.
3-5-6 Command Format Received by the Host Computer
FINS commands sent to the host computer are received at the host computer
in the format shown below.
Item Setting
Number of bytes of com-
mand data
0002 to 021E (2 to 542 bytes)
Number of bytes of
response data
0002 to 021E (2 to 542 bytes)
Serial port number 00: CPU Unit, Inner Board, CPU Bus Unit
01: Port 1
02: Port 2
Destination network
address
00: Local network
01 to 7F:Network address (1 to 127)
Destination node address 00: 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
Destination unit address 10 to 1F: Serial Communications Unit (unit address 0 to
15)
Response setting 0: Required
1: Not required
Communications port
number
0 to 7 (0 to 7)
Number of retries 0 to F (0 to 15)
Response monitor time
0000: Default (2 s)
0001 to FFFF: 0.1 to 6,553.5 s (unit: 0.1 s)
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