Mitsubishi Electric FR-A820-00046 Instruction Manual page 977

Parameters
Item
Monitoring timer
Request data
Response data
length
End code
Response data
Error information
Footer
Tab. 5-357: Description of request and response message items (2)
The serial No. is given by the external device for message recognition. If a request message with a
serial No. is sent, the same serial No. will also be added on the response message. The serial No. is
used when multiple request messages are sent from an external device to the same inverter.
FR-A800
Size Endian Description
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 settings:
Access
destination
2 bytes Little
Own station
Other station
Specify the command, subcommand, and data that indicate the
Variable Little
requested operation. (Refer to page 5-776.)
The data length from the end code to the response data (when
2 bytes Little completed) or error information (when failed) is stored in hexadecimal.
(Unit: byte)
The command processing result is stored. The value "0" is stored for
2 bytes Little normal completion. The error code of the access destination (refer to
page 5-785) is stored for failed completion.
When the command is completed normally, data such as the read data
Variable Little
corresponding to the command is stored.
The network No. (responding station) (1 byte), station No. (responding
station) (1 byte), destination unit I/O No. (2 bytes), and destination
multidrop station No. (1 byte) of the stations which respond errors are
stored for failed completion. Numbers different from those in the
9 bytes —
request message may be stored because the information on the station
with error response is stored. The command (2 bytes) and the
subcommand (2 bytes) being issued when an error occurred are also
stored.
The footer is used for the TCP/IP and UDP/IP protocols. The footer is
— —
added by the external device before transmission.
Ethernet communication (FR-A800-E)
Recommended setting
Monitoring, operation command,
frequency setting (RAM)
Parameter read/write, frequency
setting (EEPROM)
Parameter clear / all clear
Monitoring, operation command,
frequency setting (RAM)
Parameter read/write,
frequency setting (EEPROM)
Parameter clear / all clear
H1 to H40
(0.25 to 10 s)
H1 to H40
(0.25 to 10 s)
H15 to H40
(5.25 to 10 s)
H2 to H40
(0.5 to 60 s)
H2 to H40
(0.5 to 60 s)
H15 to H40
(5.25 to 60 s)
5 - 775