DENT Instruments PowerScout 24, Operator'S Manual, Page: 79 / 112

79
DENT Instruments
PowerScout 24
All Things Modbus
Command Example
This command reads from a PowerScout with an address switch setting of 37 hex, reading one byte
starting at register offset 0C hex. Note that offset 12 corresponds to Modbus register 40013. All values
are hexadecimal.
Example Request
Field Name
Command
(Hex)
Response
Field Name
Response
(Hex)
PowerScout address 37 PowerScout address 37
Command 03 Command 03
Starting register address to read– high order bits 00 Byte count 02
Starting register address to read– low order bits 0C Register value –high order bits 00
Number of registers to read – high order bits 00 Register value – low order bits 00
Number of registers to read – low order bits 01 CRC low order bits 70
CRC low order bits 41 CRC high order bits 40
CRC high order bits 9F
Table 19: Example for Modbus Command 03
Command: 3703000C0001419F
Response: 37030200007040
The response is from the PowerScout at address 37. Two
bytes were read from the requested register, 000C. The
value of the registers read was 0000. The CRC value was
4070. The number of registers read must be between 1
and 125 inclusive.