Vacon CX Series, Руководство пользователя

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VACON CX Modbus user’s manual Page 14
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Vacon Oy
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7.1.4 Function code 4, Read Variables
This function is used to read VACON CX variables.
The transaction frames:
Query:
Slave
address Function
code Starting
Address HI Starting
Address LO Number of
points HI Number of
points LO CRC16
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes
Response:
Slave
address Function
code Byte count Data HI Data LO CRC16
1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes
7.1.5 Function code 5, Write Control Bits
This function is used to set or clear control bits.
The transaction frames:
Query:
Slave
address Function
code Output
Address HI Output
Address LO Force Data
HI Force Data
LO CRC16
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes
Response:
Slave
address Function
code Output
Address HI Output
Address LO Force Data
HI Force Data
LO CRC16
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes
7.1.6 Function code 6, Write Parameter
This function is used to write VACON CX parameters.
The transaction frames:
Query:
Slave
address Function
code Register
Address HI Register
Address LO Data HI Data LO CRC16
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes
Response:
Slave
address Function
code Register
Address HI Register
Address LO Data HI Data LO CRC16
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes
7.1.7 Function code 8, Diagnostic
Diagnostic function uses the subfunction code field in the query to define the type of test to be performed.
The transaction frames:
Query:
Slave
address Function
code Subfunction
HI Subfunction
LO Data HI Data LO CRC16
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes
Response: