Pioneer PE6000 Series User Manual page 198

Appendix B
Main station sends 1
Data frame
>3.5
transmission
time
The communication protocol of PE6000 series AC drive is Modbus-RTU slave communication
protocol, which can respond the "Check/Command" of main station or make related action
according to "Check/Command" of main station and answer the communication data.
The main station includes PC, Industrial control device, PLC, etc. When main station send
"Check/Command" to a single slave station, it has to resend a answer frame; when main station
send broadcast information, slave stations have no need to respond.
J.2 Communication Information Structure
The format of Modbus protocol communication data of PE6000 series AC drive is as below: AC
drive only support the read and write of Word parameter, and the "read" operation command is
0×03； "write" operation command is 0 ×06; the read and write operation of byte and bit is not
supported.
Main station "read"
command frame
In theory, host computer can read dozens of function codes continuously（n max=12）, but it
cannot stride the last function code of this function code group, or the answer might have error.
Slave station "read"
answer frame
Slave station
answers 1
Data frame
>3.5
transmission
time
1Byte
>3.5Byte
Target station
Idle (FH)
address
>3.5Byte 1Byte
Target station
Idle (FH)
address
Main station sends 2
1Byte 2Byte
Read
Function code
command
address H-L
0×03
CRC verify
1Byte 1Byte
Read
Data byte
command
amount (2n)
0×03
CRC verify
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PE6000 User Manual
Slave station answers 2
1Byte 2Byte
Function code CRC verify
amount (n) sum H-L
(2n)Byte 2Byte
Function code CRC verify
parameter H-L sum H-L
Idle
Idle