Message Format; Request Message Format; Response Message Format; Failed Completion - Mitsubishi Electric A800-E Instruction Manual

(N) Operation via communication and its settings
Message format

• Request message format

The following is the format of a request message sent from the external device to the inverter. The request message data
length is 2047 bytes at the maximum.
Header Subheader Destination
network
No.

• Response message format

The following is the format of a response message sent from the inverter to the external device. The response message
data length is 2048 bytes at the maximum.
• Normal completion
Destination
Header Subheader
network
No.

• Failed completion

Destination
Header Subheader
network
No.
Item Size
Header —
Subheader
(QnA-compatible 2 bytes
3E frame)
Subheader
(QnA-compatible 6 bytes
4E frame)
Destination
1 byte
network No.
Destination station
1 byte
No.
Destination unit I/O
2 bytes
No.
Destination
multidrop station 1 byte
No.
Request data
2 bytes
length
30
PARAMETER
Destination Destination unit Destination
multidrop
station I/O No.
station No.
No.
Destination Destination unit Destination
multidrop
station No. I/O No.
station No.
Destination Destination unit
Destination
multidrop
station I/O No.
station
No.
No.
End code Network
No.
(responding
station)
Endian
Header for TCP/IP or UDP/IP. The header is added by the external device before
—
transmission.
Request: H5000
Response: HD000
Big
Request: H5400 + Serial No.
Response: HD400 + Serial No.
Specify the network No. of the access
destination. Use a hexadecimal value to specify
— the network number.
Own station: H00
Other stations: H01 to HEF (1 to 239)
Specify the station No. of the access destination.
Use a hexadecimal value to specify the station
— number.
Own station: HFF (when the network No. is H00)
Other stations: H01 to H78 (1 to 120)
Little Fixed to H03FF
— Fixed to H00
Specify the data length from the monitoring timer to the request data in hexadecimal.
Little
Example) 24 bytes: H1800
Request data Monitoring timer Request data
length
Response data End code
length
Response data
length
Station Destination unit Destination
multidrop
No. I/O No.
station No.
(responding
station)
Error information
Description
+ H0000

+ H0000

Response data
Command Subcommand
The own station has a network No. of H00
and a station No. of HFF. The other
stations have other values.
The request data addressed to the own
station is received regardless of the
network No. and station No. settings.
The request data addressed to the other
stations is received when the Pr.1424 and
Pr.1425 settings are the same.
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