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223
Communication operation and setting
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.
(5) Response time
[Formula for data sending time]
Communication specifications
Data check time
Error
Code
Error Item
Error Description
Inverter Operation
H0
Computer NAK error
The number of errors consecutively detected in communication request
data from the computer is greater than allowed number of retries.
Brought to trip (E. PUE)
if error occurs
continuously more than
the allowable number of
retry times.
H1
Parity error
The parity check result does not match the specified parity
H2
Sum check error
The sum check code in the computer does not match that of the data
received by the inverter.
H3
Protocol error
The data received by the inverter has a grammatical mistake.
Alternatively, data receive is not completed within the predetermined
time. CR or LF is not as set in the parameter.
H4
Framing error
The stop bit length differs from the initial setting.
H5
Overrun error
New data has been sent by the computer before the inverter completes
receiving the preceding data.
H6
—
—
—
H7
Character error
The character received is invalid (other than 0 to 9, A to F, control code).
Does not accept
received data but is not
brought to trip.
H8
—
—
—
H9
—
—
—
HA
Mode error
Parameter write was attempted in other than the computer link operation
mode, when operation command source is not selected or during inverter
operation.
Does not accept
received data but is not
brought to trip.
HB
Instruction code
error
The specified command does not exist.
HC
Data range error
Invalid data has been specified for parameter write, frequency setting,
etc.
HD
—
—
—
HE
—
—
—
HF
—
—
—
1
×
Number of data characters
×
Communication
(Total number of bits) = data send time (s)
(Refer to the following.)
Communication speed (bps)
Name
Number of
Bits
Item
Check Time
Stop bit length
1 bits
2 bits
Various monitors, operation command,
frequency setting (RAM)
< 12ms
Data length
7 bits
8 bits
Parameter read/write, frequency setting
(EEPROM)
< 30ms
Parity check
Present
1 bit
Parameter clear/all clear
< 5s
Absent
0
Reset command
No answer
In addition to the above, 1 start bit is necessary.
Minimum number of total bits.................9 bits
Maximum number of total bits................12 bits
10ms or more necessary
Computer
Inverter
Inverter
Computer
Data sending time (refer to the following formula)
(Setting 10ms)
(depends on the instruction
code (see the following table))
Inverter data processing time = waiting time + Data check time
Data sending time (refer to the following formula)
Time
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