Solar Pump Inverter Chapter 7 Communication protocol
51
Modbus abnormal code
12H
Invalid parameter
change
It only happens in write command. The written data
exceeds the parameter range. The parameter should not
be modified now. The terminal has already been used.
13H
The system is
locked
When the upper computer is reading or writing and the
user password is set without password unlocking, it will
report that the system is locked.
Address definition of communication parameters
It is used to control the inverter operation, inverter status and related parameter settings.
Read and write function parameters (some function codes cannot be changed, only for
manufacturers to use):
The rules of parameter address of the function codes:
High byte: group number before the radix point of the function code (00～15) Group 0 to
Group 15
Low byte: the number after the radix point (00～FF)
For example, the parameter address of F13.17 is 0D11H.
Note: Some parameters cannot be changed when the inverter is in the running state and
some parameters cannot be changed in any state. The setting range, unit and relative
instructions should be paid attention to when modifying the function code parameters.
Besides, EEPROM is stored frequently, which may shorten the usage time of EEPROM.
Some functions are not necessary to be stored on the communication mode. The needs
can be met on by changing the value in RAM. Changing the high bit of the function code
from 0 to 1 can also realize the function. The corresponding function code address is as
follows:
High byte: 00～0F
Low byte: 00～FF
For example, F03.12 is not stored in EEPROM, the address is 830CH; the address can
only write RAM and cannot read, read for the invalid address.
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