7 Modbus RTU
7.4 Operating mode Modbus RTU
118
DE1 variable speed starter
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7.4 Operating mode Modbus RTU
The Modbus RTU (Remote Terminal Unit) operating mode transmits data in
binary format (higher data throughput) and defines the transfer format for
data requests and data responses.
Each message byte that is sent will contain two hexadecimal characters
(0 - 9, A - F).
The data transfer between a master (PLC) and the DE1 variable speed starter
is carried out according to the following sequence:
•
Master request: the master sends a Modbus Frame to the variable
speed starter.
•
Slave response: the variable speed starter sends a Modbus frame as a
response to the master.
figure 77: Data exchange between master controller and DE1
→
The DE1 variable speed starter (slave) only sends a response if it
has received a request from the master beforehand.
Start
Slave
Master
Address (1 Byte)
Function code (1 Byte)
Data (N x 1 Byte)
CRC (2 Bytes)
End
Start
Address (1 Byte)
Function code (1 Byte)
Data (N x 1 Byte)
CRC (2 Bytes)
End
Содержание PowerXL DE1 series
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Страница 68: ...3 Installation 3 6 Block diagrams 64 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 132: ...7 Modbus RTU 7 4 Operating mode Modbus RTU 128 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 146: ...8 Technical Data 8 4 Dimensions 142 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 172: ...10 Fault messages 10 3 Fault list 168 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
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