SD1 Series Inverters Communication Protocol
-135-
VFD
address
Read
command
Parameters
data
CRC check 2-byte
data
Because the parameter data is 0032H (50) and 50 divided by 10 is 5, then the hibernation
restore delay time is 5s.
7.4.4 Error message response
Operation errors may occur in communication-based control. For example, some parameters
can only be read, but a write command is transmitted. In this case, the inverter returns an error
message response. Error message responses are sent from the inverter to the master. The
following table describes the codes and definitions of the error message responses.
01H
Invalid
command
The command code received by the upper computer is not
allowed to be executed. The possible causes are as follows:
• The function code is applicable only on new devices and is
not implemented on this device.
• The slave is in the faulty state when processing this
02H
Invalid data
address.
For the inverter, the data address in the request of the upper
computer is not allowed. In particular, the combination of the
register address and the number of the to-be-transmitted
03H
Invalid data
value
The received data domain contains a value that is not
allowed. The value indicates the error of the remaining
structure in the combined request.
Note: It does not mean that the data item submitted for
storage in the register includes a value unexpected by the
04H
Operation
failure
The parameter is set to an invalid value in the write
operation. For example, a function input terminal cannot be
05H
Password
The password entered in the password verification address
is different from that set in P07.00.
06H
Data frame
error
The length of the data frame transmitted by the upper
computer is incorrect, or in the RTU format, the value of the
CRC check bit is inconsistent with the CRC value calculated
07H
Parameter
The parameter to be modified in the write operation of the
upper computer is a read-only parameter.
The parameter to be modified in the write operation of the
To Next Page
Loading...
