81
6
. Detailed settings for communications
6.3 CompoWay/F (continued)
For example: The sub-address is less than 2 characters and there is no SID or FINS-mini
Command
The sub-address lacks a character
Response
The sub-address is "00" and the exit code is "16" (a sub-address error).
●
The composition of the Protocol Data Unit (PDU)
Command text (or PDU) consists of the main request code (MRC), the sub-request code (SRC), and the data
required by these, and these are transferred.
Service request PDU
Continuing on from the above MRC and SRC, main response codes (MRES) and sub-response codes (SRES) are
transferred to the response frame, and then the data is transferred.
Service response PDU (normal)
If the specified command text could not be executed, then the service response PDU will consist of only the MRC/
SRC and response code.
Communication
address
BCC
STX
ETX
Communication
address
Sub-address
Exit code
BCC
STX
0
0
1
6
ETX
MRC
SRC
Data
MRC
SRC
Response code
Data
MRES
SRES