6. Communication Protocol
6-5
6.2.2
Protocol Command Codes
(1)
Read Single Register (0x03)
Read the single register (16-bit data) value.
Sending Packet
Normal Receiving Packet
Byte
Content
Value
Byte
Content
Value
0
Node ID
0x00
0
Node ID
0x00
1
Function
0x03
1
Function
0x03
2
Starting Address Hi
0x00
2
Byte Count
0x02
3
Starting Address Lo
0x6B
3
Register Value Hi
0x02
4
Quantity of Register Hi
0x00
4
Register Value Lo
0x2B
5
Quantity of Register Lo
0x01
5
CRC Hi
6
CRC Hi
6
CRC Lo
7
CRC Lo
Error Receiving Packet
Byte
Content
Value
0
Node ID
0x00
1
Error Code
0x03 + 0x80
2
Exception Code
0x01 ~ 0x04
3
CRC Hi
4
CRC Lo
Example)
Request
Response
Node-ID
03
06
02
2B
CRC Hi
CRC Lo
Node-ID
03
00
6B
00
01
CRC Hi
CRC Lo
Slave Address(Node-ID)
Function Code
Staring Address Hi
Starting Address Lo
Quantity of Registers Hi
Quantity of Registers Lo
CRC Hi
CRC Lo
Slave Address(Node-ID)
Function Code
Byte Count
Register Value Hi (108)
Register Value Lo (108)
CRC Hi
CRC Lo
Summary of Contents for L7 A001
Page 1: ...VER 1 5...
Page 2: ......
Page 32: ...1 Product Components and Signals 1 20...
Page 38: ...2 Installation 2 6...
Page 54: ......
Page 188: ...7 Product Specifications 7 26 L7 A020 L7 A035 Weight 2 5 kg cooling fan included...
Page 210: ...8 Maintenance and Inspection 8 14...
Page 211: ...9 Appendix 9 1 9 Appendix...
Page 218: ...9 Appendix 9 8...
Page 221: ......
Page 222: ......