Diagnostics
48
Internal error code registers
A Modbus query can fail in many ways in the drive. The Modbus
standard does not specify detailed error descriptions. The
standard error codes are too generic. That is why the FSCA-01
RS-485 Adapter Module has an internal error register area.
The internal error register area is used if Modbus error code 0x04
occurs. The registers contain information about the last query. You
can figure out the reason of the failure by reading the registers.
The internal error register is cleared when a query has finished
successfully.
Address
Registers (16-bit word)
(4)00090
Reset internal error registers (0 = do nothing, 1 = reset)
(4)00091
Function code of the failed query
(4)00092
Internal error code, see the error No.
(4)00093
Failed register
(4)00094
Last register that was written successfully
(4)00095
Last register that was read successfully
Error code
Description
Situation
0x00
No error
Used when a modbus query was
successful.
0x02
Low or high limit
exceeded
Change access with a value outside the
value limits
0x03
Faulty subindex
Access to an unavailable subindex of an
array parameter
0x05
Incorrect data type
Change access with a value that does not
match the data type of the parameter
0x65
General error in drive
communication
Undefined error when handling a Modbus
query
0x66
Timeout
Timeout in drive communication when
handling a Modbus query
0x70
Read-only
An attempt to write a non-zero value to a
read-only drive parameter
0x71
Parameter group
ended
An attempt to write to multiple parameter
groups
0x72
MSB is not zero
An attempt to write a 16-bit parameter
with a 32-register address and the MSB
bytes are not zero
0x73
LSB query start
An attempt to access only the LSB
register of the 32-bit parameter
0x74
MSB query end
An attempt to access only the MSB
register of the 32-bit parameter
Содержание FSCA-01
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