Mitsubishi Electric FR-CS82S-025 Instruction Manual page 186

 Function code list
Read/
Function name
write
Read holding register Read
Preset single register Write
Diagnostics Read
Preset multiple registers Write
Read holding register
Read
access log
 Read Holding Register (reading data of holding registers) (H03 or 03)
• Query message
a. Slave address b. Function
H03
(8 bits)
(8 bits)
• Normal response (Response message)
a. Slave address b. Function
H03
(8 bits)
(8 bits)
• Query message setting
Message
a Slave address
b Function
c Starting address
d No. of points
• Content of normal response
Message
e Byte count
f Data
Code
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
H03
Real time monitor (Refer to
Faults history (Refer to
Model information monitor (Refer to
Inverter parameters (Refer to
Data is written to a holding register.
Data can be written to MODBUS registers to output instructions
H06 to the inverter or set parameters.
System environmental variable (Refer to
Inverter parameters (Refer to
Functions are diagnosed. (Communication check only)
A communication check can be made since the query message
H08 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)
Data is written to multiple consecutive holding registers.
Data can be written to consecutive multiple MODBUS registers
H10 to output instructions to the inverter or set parameters.
System environmental variable (Refer to
Inverter parameters (Refer to
The number of registers that were successfully accessed by
the previous communication is read.
Queries by function codes H03 and H10 are supported.
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.
c. Starting address
H L
(8 bits) (8 bits)
e. Byte count
H
(8 bits)
(8 bits)
Set the address to send messages to. Broadcast communication is not possible. (Invalid when "0"
is set.)
Set H03.
Set the holding register address from which to start reading the data.
Starting address = start register address (decimal) - 40001
For example, when starting register address 0001 is set, the data of holding register address 40002
is read.
Set the number of holding registers for reading data. Data can be read from up to 125 registers.
The setting range is H02 to HFA (2 to 250).
Twice the number of reads specified by (d) is set.
The amount of data specified by (d) is set. Read data is output Hi bytes first followed by Lo bytes,
and is arranged as follows: data of start address, data of start address+1, data of start address+2,
and so forth.
Outline
page 190.)
page 124.)
page 191.)
page 191.)
page 191.)
page 190.)
page 191.)
page 190.)
page 191.)
d. No. of points
H L
(8 bits) (8 bits)
f. Data
L ...
(8 bits) (n × 16 bits)
Description
Description
5.11 (N) Communication operation parameters
Message
Broadcast format
communication reference
page
Not available page 185
Available page 186
Not available page 186
Available page 187
Not available page 188
CRC check
L H
(8 bits) (8 bits)
CRC check
L H
(8 bits) (8 bits)
185
5. PARAMETERS
2
2
3
4
5
6
7
8
9
10