Mitsubishi Electric FR-A820-00046 Instruction Manual page 990

Ethernet communication (FR-A800-E)
Function code list
Function name
Read holding
register
Preset single
register
Diagnostics
Preset multiple
registers
Read holding
register access log
Tab. 5-369: Function code list
5 - 788
Read/
Code Outline
Write
The data of the holding registers is read.
The various data of the inverter can be read from Modbus®
registers.
System environmental variable (Refer to page 5-797.)
Read H03
Real time monitor (Refer to page 5-344.)
Faults history (Refer to page 5-801.)
Model information monitor (Refer to page 5-801.)
Inverter parameters (Refer to page 5-799.)
Data is written to holding registers.
Data can be written to Modbus® registers to output instructions to
Write H06 the inverter or set parameters.
System environmental variable (Refer to page 5-797.)
Inverter parameters (Refer to page 5-799.)
Functions are diagnosed. (communication check only)
A communication check can be made since the query message is
Read H08 sent and the query message is returned as it is as the return
message (subfunction code H00 function).
Subfunction code H00 (Return query data)
Data is written to consecutive multiple holding registers.
Data can be written to consecutive multiple Modbus® registers to
output instructions to the inverter or set parameters.
Write H10
System environmental variable (Refer to page 5-797.)
Inverter parameters (Refer to page 5-799.)
The number of registers that were successfully accessed by the
previous communication is read.
Queries by function codes H03 and H10 are supported.
The number and start address of holding registers successfully
Read H46
accessed by the previous communication are returned.
"0" is returned for both the number and start address for queries
other than function code H03 and H10.
When the connection is closed, the data in the log is cleared.
Parameters
Message
format
reference
page
5-789
5-791
5-792
5-793
5-793