15. Communication Protocol
42
0x002A Reserved
RO
43
0x002B Reserved
RO
44
0x002C Reserved
RO
45
0x002D Reserved
RO
46
0x002E Reserved
RO
47
0x002F Reserved
RO
58
0x003A
Reserved
RO
59
0x003B
Reserved
RO
60
0x003C
Reserved
RO
61
0x003D
Reserved
RO
62
0x003E
Reserved
RO
63
0x003F
Reserved
RO
For example 1) Reading status of POT input contacts
Request
Node
ID
Function
Starting
Starting
Address Hi Address Lo
Quantity of
Register Hi.
0x01
0x02
0x00
0x00
0x00
Quantity of
Register Lo
0x01
Request OK
Node
Function Byte Count
ID
0x01
0x02
0x01
- The status of POT is Low.
Register
Value
0x00
Response not OK
CRC Hi CRC Lo
0xA1
0x88
Node ID
0x01
Error Code
0x82
Exception Code
0x01 ~ 0x04
CRC Hi
-
CRC Lo
-
CRC Hi
0XB9
CRC Lo
0xCA
(3) Read Holding Register (0x03)
Reads the values of single register (16bit data) and continuousregister block (16bit data unit).
Request
Function code
Starting Address
Quantity of Registers
Request OK
Function code
Starting Address
1Byte
2Byte
2 Bytes
1Byte
1Byte
0x03
0x0000 to 0xFFFF
1 to 125 (0x7D)
0x03
2 x N*
15-9
