Mitsubishi Electric A800-E, Instruction Manual

Page: 42 / 84

(N) Operation via communication and its settings
PARAMETER
41
2
GROUP
N
 Function code list
Function name Read/write Code Outline
Message
format
Refer to
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 48 .)
Real time monitor (Refer to the Instruction Manual (Detailed) of
the FR-A800/FR-F800 inverter.)
Faults history (Refer to
page 50 .)
Model information monitor (Refer to page 50 .)
Inverter parameters (Refer to page 49 .)
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Preset single register Write H06
Data is written to a holding register.
Data can be written to MODBUS registers to output instructions
to the inverter or set parameters.
System environmental variable (Refer to
page 48 .)
Inverter parameters (Refer to page 49 .)
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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)
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Preset multiple registers Write H10
Data is written to multiple consecutive 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 48 .)
Inverter parameters (Refer to page 49 .)
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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.
When the connection is closed, the data in the log is cleared.
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