TECO E510s Series - Page 379

AP 3-9
 Read Holding Register [03H]
Read consecutive holding registers. The address of the first holding register is specified in the
protocol
Example: Read frequency command from the inverter with node address 1.
ASCII Mode
Command Message Response Message (Normal) Response Message (Error)
3AH STX 3AH STX 3AH STX
30H
Node
Address
30H
Node Address
30H
Node
Address
31H 31H 31H
30H
Function
30H
Function
38H
Function
33H 33H 33H
30H
Starting
Register
30H
Data Length
30H
Exception
code
43H 32H 34H
31H 31H
Initial Save
Register
34H
LRC CHECK
30H 37H 30H
30H
Number of
Registers
37H 0DH
END
30H 30H 0AH
30H 37H
LRC CHECK
+
31H 33H
44H
LRC CHECK
0DH
END
46H 0AH
0DH
END
0AH
RTU Mode
Command Message Response Message (Normal) Response Message (Error)
Node Address 01 H Node Address 01H Node Address 01H
Function 03H Function 03H Function 83H
Starting
Register
High 0CH DATA Length 02H Exception Code 04H
Low 10H
Initial Save
Register
High 17H
CRC-16
High 40H
Number of
Registers
High 00H Low 70H Low F3H
Low 01H
CRC-16
High B6H
CRC-16
High 86H Low 50H
Low 9FH