9-19 Specifications
9
The inverter does not return NAK in response to
errors 47 through 49 above. It issues no
response.
In the case of errors 4A through 50, an NAK
response with an NAK code in the response
character field and the two digit hexadecimal
error code in the data field is returned.
The latest error can be referred to using the
transmission error end code monitor (M26).
9-4-10 Data Type
(1) In the case of value data
16 bit data is expressed in a hexadecimal
and set using four ASCII codes. Concretely
speaking, the data is between "0000" and
"FFFF".
Decimal fractions are weighted into integers.
Refer to the corresponding section because
the weight varies according to each piece of
function data. In some functions, the
negative value is expressed in two's
complement.
The bit data is converted into the
hexadecimal and expressed.
The acknowledgement sent from the inverter
in response to a selecting (writing) request is
the writing data. In the negative
acknowledgement, the error code is
returned in two hexadecimal characters.
Set "0000" or an arbitrary letters and
numbers in the data to be transmitted to the
inverter in a polling (reading) frame.
Example: Frequency data, weight 100 times
120.00Hz 120Å~100=12000=2EE0H
9-4-9 Communication Error Code
The inverter detects the following errors.
The error code is in hexadecimal notation.
Table 9-4-4 Communication error code
Error code Name of error Description
(hexadecimal)
47H Checksum error The checksum of the frame sent to the own station is in
discrepancy.
48H Parity error The parity is in discrepancy.
49H Others Reception error other than above (framing, overrun)
4AH Format error The enquiry character or the end-of-text character in the
transmitted frame is in an incorrect position.
4BH Command error A code other than designated commands (standard and
option) is sent.
4EH Function code error A request for an unknown function code is issued.
4FH Write disable A write prohibited function or in-operation write prohibited
function is written during operation.
50H Data error Data exceeding the standard range is written.
The data is "2" in ASCII, "E" in ASCII, "E" in
ASCII and "0" in ASCII in order from the first
character to the fourth character.
Acceleration time data, weight 10 times
6.5 sec: 6.5 x 10 = 65 = 41H
The data is "0" in ASCII, "0" in ASCII, "4" in
ASCII and "1" in ASCII in order from the first
character to the fourth character.
(2) In the case of bit data
For bit type data requested by S06, M13 or
other functions, the bit data is expressed in
hexadecimal notation and each digit is
transmitted in ASCII codes.
Example: S06 with FWD (bit 0) ON, X1 (bit
2) ON, and X3 (bit 4) ON
Bit data = 0000 0000 0001 0101 → 0015H
→ 30H 30H 31H 35H
(Hexadecimal) (ASCII)
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