Introducing Modbus Protocol
The Modbus RTU protocol is used for communication in
Ai
205. The data
format and error check method are defined in Modbus protocol. The half duplex
query and respond mode is adopted in Modbus protocol. There is only one
master device in the communication net. The others are slave devices, waiting
for the query of the master.
Transmission mode
The mode of transmission defines the data structure within a frame and the
rules used to transmit data. The mode is defined in the following which is compatible
with Modbus RTU Mode*.
Modbus is trademark of Modicon, Inc.
62
Coding System
Start bit
Data bits
Parity
Stop bit
Error checking
8-bit binary
1
8
no parity
1
CRC check
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Summary of Contents for Ai205
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Page 12: ...Chapter 2 Installation Appearance and Dimensions Installation method Wiring of Ai205 7 ...
Page 26: ...3 2LN 2CT 4 2LN 1CT 5 2LL 3CT 21 Fig 2 20 2LN 2CT Fig 2 21 2LN 1CT Fig 2 22 2LL 3CT ...
Page 98: ...Appendix Appendix A Technical data and specifications Appendix B Ordering 93 ...
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