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Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual Page 223

Fr-e700 series.
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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
Instruction code
HB
error
HC
Data range error
HD
HE
HF
(5)
Response time
Data sending time (refer to the following formula)
Computer
Inverter
Inverter
Computer
[Formula for data sending time]
1
Communication speed (bps)
Communication specifications
Name
Stop bit length
Data length
Present
Parity check
Absent
In addition to the above, 1 start bit is necessary.
Minimum number of total bits ................. 9 bits
Maximum number of total bits ................12 bits
Error Description
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 is not completed within the 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.
The specified command does not exist.
Invalid data has been specified for parameter write, frequency setting,
etc.
Inverter data processing time = waiting time + Data check time
(Setting 10ms)
10ms or more necessary
Data sending time (refer to the following formula)
Number of data characters
×
(Refer to page 220)
Number of
Bits
1 bits
2 bits
7 bits
8 bits
1 bit
0
Communication operation and setting
(depends on the instruction
code (see the following table))
Time
Communication
×
(Total number of bits) = data send time (s)
(Refer to the following.)
Data check time
Item
Various monitors, operation command,
frequency setting (RAM)
Parameter read/write, frequency setting
(EEPROM)
Parameter clear/all clear
Reset command
Inverter Operation
Brought to trip (E. PUE)
if error occurs
continuously more than
the allowable number of
retry times.
Does not accept
received data but is not
brought to trip.
Does not accept
received data but is not
brought to trip.
4
Check Time
< 12ms
< 30ms
< 5s
No answer
223

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