Fuji Electric FRENIC-AQUA series User Manual page 52

[ 8 ] Error response
If the inverter receives an improper query, it will not execute it, which will result in error
response.
Error response
1 byte
Station
Exception function
address
Interpretation of error response
- The station address is the same as that of the query.
- The exception function is a value obtained by adding 80
(or the value of the 'FC' if the 'FC' is larger than 80
For example, when the 'FC' is 3, the exception function is 3 + 128 = 131 (83
- The subcode represents the code of the reason for the improper query.
Subcode Item
1 Improper 'FC'
2 Improper Improper
address function
code
Improper
number of
data
Diagnostic
code error
(maintena-
nce code)
3 Improper Data range
data error
7 NAK No right of
writing
Write
disable
*1 The priority between sub code 3 and 7 depending on a cause of sub code 7.
- If response is sent back to an improper query, a subcode will be set in an error code (that
can be referred to with M26).
1 byte
Table 3.8 Subcodes
The inverter received an unsupported FC. (See
Table 3.1.)
An unused function code or a function code out of
range was received.
When the read/write data (except the first one)
containing an unused function code.
- During function reading
Zero (0) will be read, which will not result in an error.
- During continuous function writing
The writing will be ignored, which will not result in
an error.
- When the number of read/write data is not
between 1 and 50.
- No error will result when the value of the function
code plus the number of data is beyond the
setting range of the function code.
A value other than 0 was received although the sub
code as the diagnostics was fixed to 0.
The write data is beyond the permissible write
range.
No right of writing by H30/y98/y99
- Writing was attempted to the functions to which
writing from RTU is prohibited or to which writing
is disabled during operation.
- Writing was attempted to a function code (other
than S01, S05, S06, S13, S14, S19, S31 to S33,
and S90 to S93) that could not be written when
the voltage was insufficient.
3-11
1 byte 2 bytes
Subcode Error check
to the 'FC' of the query message
H
).
H
Description
3.1 Messages
).
H
Order of
priority
1
2
3*1