Mitsubishi Electric FR-A820-00046 Instruction Manual page 861

Parameters
Function code list
Function
name
Read holding
register
Preset single
register
Diagnostics
Preset multiple
registers
Read holding
register access
log
Tab. 5-289: Function code list
FR-A800
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 5-666.)
Read H03
Real time monitor (Refer to page 5-345.)
Faults history (Refer to page 5-670.)
Model information monitor (Refer to page 5-670.)
Inverter parameters (Refer to page 5-668.)
Data is written to holding registers.
Data can be written to Modbus® registers to output
Write H06 instructions to the inverter or set parameters.
System environmental variable (Refer to page 5-666.)
Inverter parameters (Refer to page 5-668.)
Functions are diagnosed. (communication check only)
A communication check can be made since the query
message is sent and the query message is returned as
Read H08
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
Write H10
parameters.
System environmental variable (Refer to page 5-666.)
Inverter parameters (Refer to page 5-668.)
The number of registers that were successfully
accessed by the previous communication is read.
Queries by function codes H03 and H10 are
supported.
Read H46
The number and start address of holding registers
successfully 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.
(N) Operation via communication and its settings
Message
Broadcast
format
communica-
reference
tion
page
Not available 5-660
Available 5-661
Not available 5-662
Available 5-663
Not available 5-664
5 - 659