Mitsubishi Electric 800 Series Instruction Manual page 90

• 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)
Big
Subheader
(QnA-compatible 6 bytes
4E frame)
Destination
1 byte —
network No.
Destination
1 byte —
station No.
Destination unit I/
2 bytes Little
O No.
Destination
multidrop station 1 byte —
No.
Request data
2 bytes Little
length
Monitoring timer 2 bytes Little
Request data Variable Little
Destination
Destination Destination unit
multidrop
station No. I/O No.
station No.
Destination Destination unit
Destination
station I/O No. multidrop
station
No.
No.
End code Network Station
No. No.
(responding (responding
station) station)
Endian
Header for TCP/IP or UDP. The header is added by the external device before transmission.
Request: H5000
Response: HD000
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)
Fixed to H03FF
Fixed to H00
Specify the data length from the monitoring timer to the request data in hexadecimal.
Example) 24 bytes: H1800
Set the waiting time until the inverter completes reading/writing after receiving a request
message from the external device.
When the inverter does not return the response message within the waiting time, the
response message will be discarded.
• H0000: Unlimited (until the execution is completed)
• H0001 to HFFFF (1 to 65535): Waiting time (Unit: 0.25 s)
Recommended setting
• When the access destination is the own station:
Monitoring, operation command, frequency setting (RAM): H1 to H40 (0.25 to 10 s)
Parameter read/write, frequency setting (EEPROM): H1 to H40 (0.25 to 10 s)
Parameter clear / All parameter clear: H15 to H40 (5.25 to 10 s)
• When the access destination is any other station:
Monitoring, operation command, frequency setting (RAM): H2 to H40 (0.5 to 60 s)
Parameter read/write, frequency setting (EEPROM): H2 to H40 (0.5 to 60 s)
Parameter clear / All parameter clear: H15 to H40 (5.25 to 60 s)
Specify the command, subcommand, and data that indicate the requested operation. (Refer
to page 90.)
Response data End code Response data
length
Response data
length
Destination unit Destination Command
multidrop
I/O No.
station No.
Error information
Description
*1
+ H0000
*1
+ H0000
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.
Footer
Subcommand Footer
89
2. Ethernet Communication
2.10 SLMP
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