Error Sub codes are:
1 = Invalid Function Code. Indicates that the use of an invalid or unimplemented function has been
attempted.
2 = Invalid Address Field. Indicates that a read or write was made to an invalid address. Can also
indicate that a read or write to a single register of a 32-bit value has been attempted.
3 = Invalid Data Field. Indicates that an attempt to write an invalid value to a register has occurred.
This error code will also be returned if an attempt is made to change a value under Weights and Measures
control without with W&M switch being in the active state.
4 = Query Processing Failure. This code is not returned.
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