94
Frame Structure Section 6-2
Invalid Subaddress and BCC
■ Command
■ Response
The end code is 13 (BCC error).
There was a subaddress error, but the BCC error has a higher error priority.
6-2-3 FINS-mini Structure
The FINS-mini command text and response text provides the contents of the
command and response communications.
PDU Structure The MRC (Main Request Code), SRC (Sub-Request Code), and any required
data are transmitted in the command frame.
■ Service Request PDU
The MRC and SRC shown above, MRES (Main Response Code), SRES
(Sub-Response Code), and the response data are transmitted in the
response frame.
■ Service Response PDU (Normal Response)
If the specified FINS-mini command could not be executed, service response
PDU will contain only the MRC/SRC and MRES/SRES.
■ Service Response PDU (Specified FINS-mini Command Not Executed)
The MRES and SRES become the response code when the command was
not completed normally.
Type Code
(Variable Type)
The following table shows the variable area type codes.
0 1 0
A Err
Node No. Subaddress
BCC
STX
ETX
0 1 0
0
1 3
Node No. Subaddress BCC
End code
STX
ETX
DataMRC SRC
Data
MRC
SRC
MRES
SRES
MRC
SRC
MRES
SRES
Variable type R/W Size Contents
80 R Word Monitored values and alarm status
81 R/W Word Setting and checking set values
To Next Page
Loading...
Need help?
General
