50
Example Command
This command reads from a PowerScout 3 with an address switch setting of 37 hex (55 in decimal),
reading one byte starting at register offset 0C hex (12 in decimal). Note that offset 12 corresponds to
modbus register 40013. All values are hexadecimal; spaces are not sent.
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 F-3: Format 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.
Write Single Register
This command writes to a single holding register of the PowerScout. The normal response is an echo of
the request, returned after the register contents are written.
Command Information
Command
Layout
Example
Command
PowerScout address
nn
37
Command number
06
06
Register to write – high order bits
xx
00
Register to write – low order bits
xx
00
Register value to write – high order bits
xx
00
Register value to write – low order bits
xx
00
CRC low order bits
xx
8C
CRC high order bits
xx
5C
Table F-4: Format for Modbus Command 06
NOTE
: The value sent as the register address in
the read and write modbus commands is not
the register listed in the table, instead an
abbreviated version is sent. The actual register
address sent is the modbus register value
minus 40001. For example, the address sent in
the command message for register 40025 is
actually 0024 (0018 hexadecimal), and the
address sent for register 44062 is actually 4061
(0FDD hexadecimal).
Содержание PowerScout 3
Страница 19: ...15 Figure IV 1 Single Phase Two Wire N white L1 black L2 red L3 blue ...
Страница 20: ...16 Figure IV 2 Single Phase Three Wire N white L1 black L2 red L3 blue ...
Страница 21: ...17 Figure IV 3 Three Phase Three Wire Delta N white L1 black L2 red L3 blue ...
Страница 22: ...18 Figure IV 4 Three Phase Four Wire Wye N white L1 black L2 red L3 blue ...
Страница 23: ...19 Figure IV 5 Three Phase Four Wire Delta N white L1 black L2 red L3 blue ...
