Mitsubishi Electric FR-A800, Instruction Manual

Page: 814 / 1042

(N) Operation via communication and its settings Parameters
5 - 634
Function code list
Function
name Read/
Write
Code Outline
Broadcast
communica-
tion
Message
format
reference
page
Read Holding
Register
Read H03
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 5-641.)
Real time monitor (Refer to page 5-328.)
Faults history (Refer to page 5-645.)
Model information monitor (Refer to page 5-645.)
Inverter parameters (Refer to page 5-643.)
Not available 5-635
Preset Single
Register
Write H06
Data is written to holding registers.
Data can be written to Modbus registers to output
instructions to the inverter or set parameters.
System environmental variable (Refer to page 5-641.)
Inverter parameters (Refer to page 5-643.)
Available 5-636
Diagnostics Read H08
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
it is as the return message (subfunction code H00
function).
Subfunction code H00 (Return Query Data)
Not available 5-637
Preset Multiple
Registers
Read H10
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.
System environmental variable (Refer to page 5-641.)
Inverter parameters (Refer to page 5-643.)
Available 5-638
Read holding
register access
log
Read H46
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 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.
Not available 5-639
Tab. 5-282: Function code list