Eaton M-Max series, Руководство по эксплуатации

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04/10 MN04020001Z-EN
Modbus Process Data
145
Function code 06 [hex]: Writing a holding register
This function writes the data to a holding register (of specified
register addresses).
Example:
Writing of the control word (BUS) (ID 2001) of an MMX frequency
inverter with the slave address 5.
Master request: 05 06 07D0 0003 C2C8 [hex]
Slave response: 05 06 07D0 0003 C8C2 [hex]
The slave response is a copy of the master request if it is a normal
response.
Function code 10 [hex]: Writing of the holding registers
This function writes data to a number of consecutive holding
registers (of specified register addresses).
Example:
Writing of the control word (ID 2001) of the general control word
(ID 2002) and the speed setpoint (ID2003) of an MMX frequency
inverter with the slave address 5.
Master request:
05 10 07D0 0003 06 0001 0000 2710 D125 [hex]
Slave response: 05 10 07D0 0003 8101 [hex]
hex Name
05 Slave address
06 Function code (here: Writing of a
holding
register
)
07D0 2000 [dec]: The ID number of the written register
is 2001 [dec] as the master PLC has an offset of
+1.
0003 Content (2 bytes) for register 42101:
0000 0000 0000 0011 [bin]
a anticlockwise, RUN
C2C8 CRC
hex Name
05 Slave address
06 Function code (here: Writing of a
holding
register
)
07D0 2000 [dec]: The ID number of the first requested
register is 2001 [dec] as the master PLC has an
offset of +1.
0003 Content (2 bytes) for register 42101:
0000 0000 0000 0011 [bin]
a anticlockwise, RUN
C8C2 CRC
h Function code 06 [hex] can be used for broadcasting.
h Caution:
Although the registers to be written are consecutive, the
ID numbers of the parameter list are not. Only the ID
numbers in the process data list are consecutive.
hex Name
05 Slave address
10 Function code (here: Writing of the
holding
registers
)
07D0 2000 [dec]: The ID number of the first written
register is 2001 [dec] as the master PLC has an
offset of +1.
0003 Total number of requested registers
(42001 - 42103)
06 Number of consecutive data bytes
(3 registers x 2 bytes = 6 bytes)
0001 Content (2 bytes) for register 42101:
0000 0000 0000 0001
[bin] (Start command)
0000 Content (2 bytes) for register 42102:
0000 [dec] (no content, as not used)
2710 Content (2 bytes) for register 42103:
10.000 [dec] (frequency setpoint =
100.00 %)
D125 CRC
hex Name
05 Slave address
10 Function code (here: Writing of the
holding
registers
)
07D0 2000 [dec]: The ID number of the first written
register is 2001 [dec] as the master PLC has an
offset of +1.
0003 Total number of requested registers
(42001 - 42103)
8101 CRC
h Function code 10 [hex] can be used for broadcasting.