Mitsubishi Electric FR-A700 Technical Manual page 414

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 bits12 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 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 the computer link operation mode,
operation command source is not selected or 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
characters
(Refer to page 438)
Number of Bits
1 bits
2 bits
7 bits
8 bits
Yes 1 bits
No 0
Error Description
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Waiting time
(setting 10ms)
Time
Communication specifications
(total number of bits)
(Refer to the following.)
Data check time
Various monitors, run command,
Set frequency (RAM)
Parameter read/write, frequency
setting (EEPROM)
Parameter clear/all clear
Reset command
448
Inverter Side Operation
Brought to trip (E. PUE/
E.SER) if error occurs
continuously more than the
allowable number of retry
times.
Does not accept received data
Does not accept received data
Data check time
(depends on the
instruction code (see the
following table))
= Data send time (s)
Item Check Time
12ms
30ms
5s
No answer
PARAMETER
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