But the setting range of the "Running command channel" is 0 to 2. The value 3 exceeds the setting
range. In this case, the VFD returns an error message response as shown in the following:
The exception response code 86H (generated based on the MSB "1" of the write command 06H)
indicates that it is an exception response to the write command (06H). The error code is 04H. From
the preceding table, we can see that it indicates the error "Operation failure", which means "The
parameter is set to an invalid value in the write operation".
9.4.7 Read/Write operation example
For the formats of the read and write commands, see sections 9.4.1 and 9.4.2.
9.4.7.1 Read command 03H examples
Example 1: Read state word 1 of the VFD whose address is 01H. From the table of other function
parameters, we can see that the parameter address of state word 1 of the VFD is 2100H.
The read command transmitted to the VFD is as follows:
The data content returned by the VFD is 0003H, which indicates that the VFD is in the stopped state.
Example 2: View information about the VFD whose address is 03H, including "Type of current fault"
(P07.27) to "Type of last but four fault" (P07.32) of which the parameter addresses are 071BH to
0720H (contiguous 6 parameter addresses starting from 071BH).
The command transmitted to the VFD is as follows:
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