Mitsubishi Electric MR-J4-_GF, Instruction Manual

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3. SLMP
3 - 3
Item Size Endian Description
header This header is for UDP/IP. The header is added on the external device side
before being sent.
TCP/IP is not supported.
Subheader
(QnA compatible 3E
frame) 2 bytes Big At a request: 5000h
At a response: D000h
Subheader
(QnA compatible 4E
frame) 6 bytes Big At a request: 5400h + Serial 0000h
At a response: D400h + Serial 0000h
Request destination
network No. 1 byte Specify the network No. of the access destination. Specify it in hexadecimal.
Store a value of a request message.
Request destination
station No. 1 byte Specify the station number of the access destination. Specify it in
hexadecimal.
Store a value of a request message.
Request destination unit
I/O No. 2 bytes Little 03FFh (fixed)
Request destination
multi-drop station No. 1 byte 00h (fixed)
Request data length 2 bytes Little Specify the data length from the monitoring timer to the request data in
hexadecimal.
Example) For 24 bytes: 1800h
Monitoring timer 2 bytes Little Set the waiting time until the servo amplifier that had received a request
message from an external device completes read or write processing.
When the servo amplifier cannot return a response message within the
waiting time, the response message will be discarded.
0000h: Waiting until the processing is completed
0001h to FFFFh (1 to 65535): Waiting time (Unit: 0.25 s)
Request data Variable Little Specify the command, sub command, and data that indicate the request
content.
Command 2 bytes Little Refer to section 3.3.
Sub command 2 bytes Little Refer to section 3.3.
Response data length 2 bytes Little The data length from the end code to the response data (at normal
completion) or to the error information (at abnormal completion) is stored in
hexadecimal. (Unit: byte)
End code 2 bytes Little The command processing result is stored. "0" is stored at normal completion.
An error code of the servo amplifier is stored at abnormal completion.
Refer to section 3.5 for the error code.
Response data Variable Little The read data and others corresponding to the command are stored at normal
completion.
Error information 9 bytes The network No. (responding station) (1 byte), station No. (responding station)
(1 byte), request destination module I/O No. (2 bytes), and request destination
multi-drop station No. (1 byte) of a station that responds an error are stored at
abnormal completion. Numbers that do not correspond to the content of the
request message may be stored because the information of the station that
responds an error is stored at abnormal completion. The command (2 bytes)
and sub command (2 bytes) in which an error occurs are also stored.
Footer This footer is for UDP/IP. The footer is added on the external device side
before being sent.
TCP/IP is not supported.