Mitsubishi Electric fr-e700 series, Инструкция по эксплуатации

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Parameter Communication operation and setting
FR-E700 SC EC/ENE 6 - 269
Message format types
The message formats corresponding to the function codes in Tab. 6-89 will be explained.
●
Read holding register data (H03 or 03)
Can read the description of system environment variables, real-time monitor, alarm history, and
inverter parameters assigned to the holding register area. (Refer to the register list on page 6-277.)
Query Message
Response message
���
Slave
Address
���
Function
���
Starting Address
���
No. of Points CRC Check
(8 bits)
H03
(8 bits)
H
(8 bits)
L
(8 bits)
H
(8 bits)
L
(8 bits)
L
(8 bits)
H
(8 bits)
���
Slave
Address
���
Function
���
Byte
Count
���
Data CRC Check
(8 bits)
H03
(8 bits)
(8 bits)
H
(8 bits)
L
(8 bits)
...
n 16 bits
L
(8 bits)
H
(8 bits)
Message Description
���
Slave Address
Set the address to which the message will be sent. Broadcast communication
cannot be made (0 is invalid)
���
Function Set H03.
���
Starting Address
Set the address at which holding register data read will be started.
Starting address = starting register address (decimal) + 40001
For example, setting of the starting address 0001 reads the data of the holding
register 40002.
���
No. of Points
Set the number of holding registers from which data will be read. The number
of registers from which data can be read is a maximum of 125.
Tab. 6-90: Description of the query message
Message Description
���
Byte Count
The setting range is H02 to HFA (2 to 250).
Twice greater than the No. of Points specified at
���
is set.
���
Data
The number of data specified at
���
is set. Data are read in order of Hi byte and
Lo byte, and set in order of starting address data, starting a 1 data,
starting a 2 data, ...
Tab. 6-91: Description of normal response