Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 643

NAK code.
Error 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
HC Data range error
HD —
HE —
HF Normal (no error)
 Response time
*1 Refer to page
*2 Communication specifications
Name
Stop bit length
Data length
With
Parity check
Without
In addition to the above, 1 start bit is necessary.
Minimum number of total bits: 9 bits
Maximum number of total bits: 12 bits
*3 Data check time
Monitoring, operation command, frequency setting (RAM) < 12 ms
Parameter read/write, frequency setting (EEPROM)
Parameter clear / all clear
Reset command
642
5. PARAMETERS
5.15 (N) Communication operation parameters
Error item
The number of errors consecutively detected in
communication request data from the computer is greater
than the permissible 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.
Or, 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 instruction code does not exist.
Invalid data has been specified for parameter writing, running
frequency setting, etc.
—
—
—
Data sending time (refer to the following formula)
Inverter data processing time
Computer
Inverter
Inverter
Computer
Data sending time (refer to the following formula)
[Formula for data transmission time]
1
Number of data characters *1
Communication
speed (bps)
638.
Number of bits
1 bit
2 bits
7 bits
8 bits
1 bit
0
Item
Error description
Waiting time
(setting 10 ms)
Time
10 ms or more necessary
Communication specifications
(Total number of bits) *2
Check time
< 30 ms
< 5 s
No reply
Inverter operation
The inverter output is shut off
(E.PUE/E.SER) if error occurs
continuously more than the
permissible number of retries.
The LF signal is output.
—
The inverter does not accept the
received data. However, the
inverter output is not shut off.
—
—
The inverter does not accept the
received data. However, the
inverter output is not shut off.
—
—
—
Data check time
(depends on the
instruction code*3)
data transmission time (s)