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7) Error Code
If any error is found in the data received by the inverter, its definition is sent back to the computer together with the
NAK code.
Error
Error Item
Code
H0
Computer NAK error
H1
Parity error
H2
Sum check error
H3
Protocol error
H4
Framing error
H5
Overrun error
H6
H7
Character error
H8
H9
HA
Mode error
HB
Instruction code error The specified command does not exist.
HC
Data range error
HD
HE
HF
(5) Response time
Computer
Inverter
Inverter
Computer
[Formula for data sending time]
1
Communication
speed (bps)
Communication specifications
Name
Stop bit length
Data length
Parity check
In addition to the above, 1 start bit is necessary.
Minimum number of total bits....... 9 bits
Maximum number of total bits...... 12 bits
The number of errors consecutively detected in communication
request data from the computer is greater than allowed number of
retries.
The parity check result does not match the specified parity.
The sum check code in the computer does not match that of the
data received by the inverter.
The data received by the inverter has a grammatical mistake.
Alternatively,
data
receive
predetermined time. CR or LF is not as set in the parameter.
The stop bit length differs from the initial setting.
New data has been sent by the computer before the inverter
completes receiving the preceding data.
The character received is invalid (other than 0 to 9, A to F, control
code).
Parameter write was attempted in other than the computer link
operation mode, when operation command source is not selected
or during inverter operation.
Invalid data has been specified for parameter write, frequency
setting, etc.
Data sending time (Refer to the following formula)
Inverter data processing time
10ms or more necessary
Data sending time (Refer to the following formula)
Number of data
Communication specifications
characters
(total number of bits) = Data send time (s)
(See below.)
(Refer to page 197)
Number of
Bits
1 bit
2 bits
7 bits
8 bits
Yes
1 bit
No
0
Communication operation and setting
Error Definition
is
not
completed
Waiting time
Data check time
(setting
10ms)
(depends on the
instruction code (see the
following table))
Time
Data check time
Item
Various monitors, run command, frequency
setting (RAM)
Parameter read/write, frequency setting
(EEPROM)
Parameter clear/all clear
Reset command
Inverter Operation
Brought to trip if error
occurs continuously
more than the allowable
number of retries.
within
the
(E.PUE/E.SER)
Does not accept
received data but is not
brought to trip.
Does not accept
received data but is not
brought to trip.
Check Time
<12ms
<30ms
<5s
No answer
4
199

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