Mitsubishi Electric 800 Series Instruction Manual page 560

• Error code
If any error is found in the data received by the inverter, its error 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
HC Data range error
HD ——
HE ——
HF Normal (no error)
Response time
Computer
Inverter
Inverter
Computer
[Formula for data transmission time]
1
Communication speed (bps)
Communication specifications
Name Number of bits
1 bit
Stop bit length
2 bits
7 bits
Data Length
8 bits
1 bit
Parity check
0
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 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, set frequency
setting, etc.
——
——
——
Data sending time (refer to the following formula)
Inverter data processing time
10 ms or more necessary
Data sending time (refer to the following formula)
Number of data characters

(Refer to page
Data check time
Various monitors, operation command,
Frequency setting (RAM)
Parameter read/write,
Frequency setting (EEPROM)
Parameter clear / all clear
Reset command
(N) Operation via communication and its settings
Waiting time Data check time
(setting 10 ms) (depends on the
instruction code (see the
following table))
Time
Communication specifications

(Total number of bits) = data transmission time (s)
556.)
(Refer to the following.)
Item
Inverter Operation
Trips (E.PUE/E.SER) if error
occurs continuously more
than the permissible number
of retries.
The LF signal is output.
——
Does not accept the received
data, but the inverter does not
trip.
——
——
Does not accept the received
data, but the inverter does not
trip.
——
——
——
Check time
<12 ms
<30 ms
<5 s
No answer
PARAMETERS
5
GROUP
N
559