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Sending Commands From a Host Computer Section 5-4
FINS Command Frame Configuration
FINS Response Frame
Configuration
The response code (one byte each for MRES and SRES) for the command is
added at the beginning of the FINS parameter/data field in the response
frame.
FINS Header Information ICF (Information Control Field)
RSV (Reserved by system)
Set to 00 (Hex).
GCT (Permissible Number of Gateways)
Set to 02 (Hex).
DNA (Destination Network Address)
Specifies the number of the network where the destination node is located.
00 (Hex): Local network
01 to 7F (Hex): Destination network number (1 to 127)
DA1 (Destination Node Address)
Specifies the number of the node where the command is being sent. This
node number is the address used for FINS, and is different from the IP ad-
FINS header
FINS command
FINS parameter/data
Parameter/
data field
Size (bytes)
Contents
Displays frame information
Reserved by system.
Permissible number of gateways
Destination network address
Destination node address
Destination unit address
Source network address
Source node address
Source unit address
Service ID
Main request code
Sub-request code
2000 max.
Command parameters and send data
The data length depends on the MRC and SRC.
1
1
1
1
1
1
1
1
1
1
1
1
ICF
RSV
GCT
DNA
DA1
DA2
SNA
SA1
SA2
SID
MRC
SRC
FINS
parameter/data field
FINS header
FINS command
Data
Size (bytes)
Contents
Same as in command frame.
Same as in command frame.
Main response code
Sub-response code
1998 max.
Response data
There are some frames in which
the data length is 0.
10
2
1
1
MRES
SRES
76543210
1 0 0 0 0 0
Bit
Response Request Bit
(0: Response required; 1: Response not required)
Kind of data (0: command; 1: response)