Mitsubishi Electric A800-E, Instruction Manual

Page: 31 / 84

(N) Operation via communication and its settings
30
PARAMETER
 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.
• 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.
Item Size Endian Description
Header — —
Header for TCP/IP or UDP/IP. The header is added by the external device before
transmission.
Subheader
(QnA-compatible
3E frame)
2 bytes
Big
Request: H5000
Response: HD000
Subheader
(QnA-compatible
4E frame)
6 bytes
Request: H5400 + Serial No.

+ H0000
Response: HD400 + Serial No.

+ H0000
Destination
network No.
1 byte —
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)
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.
Destination station
No.
1 byte —
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)
Destination unit I/O
No.
2 bytes Little Fixed to H03FF
Destination
multidrop station
No.
1 byte — Fixed to H00
Request data
length
2 bytes Little
Specify the data length from the monitoring timer to the request data in hexadecimal.
Example) 24 bytes: H1800
Destination unit
I/O No. Header Subheader Destination
station
No. Destination
network
No. Destination
multidrop
station No. Request data
length Monitoring timer Request data Footer
Destination unit
I/O No. Header
• Normal completion
Subheader Destination
station No.
Destination
network
No.
Destination
multidrop
station No.
Destination
multidrop
station
No.
Destination
multidrop
station No.
Response data
length End code Response data Footer
Footer
Destination unit
I/O No.
Header
• Failed completion
Subheader
Destination
station
No.
Destination
network
No.
Response data
length
Destination unit
I/O No. Station
No.
(responding
station) Network
No.
(responding
station)
Error information
Command Subcommand End code