Mitsubishi FR-A800

(N) Operation via communication and its settings
PARAMETERS
569
5
GROUP
N
• 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.
Response time
[Formula for data transmission 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 the permissible
number of retries.
Trips (E.PUE/E.SER) if error
occurs continuously more
than the permissible number
of retries.
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. Or, 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 the received
data, burt the inverter does
not 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 the received
data, but the inverter does not
trip.
HB Instruction code error The specified instruction code does not exist.
HC Data range error
Invalid data has been specified for parameter writing, running
frequency setting, etc.
HD —— —— ——
HE —— —— ——
HF Normal (no error) —— ——
1

Number of data characters
(Refer to page 566.)

Communication specifications
(Total number of bits) = data transmission time (s)
(Refer to the following.)
Communication speed (bps)
Name Number of bits Item Check time
Stop bit length
1 bit
2 bits
Various monitors, operation command,
Frequency setting (RAM)
<12 ms
Data Length
7 bits
8 bits
Parameter read/write,
Frequency setting (EEPROM)
<30 ms
Parity check
With
1 bit Parameter clear / all clear <5 s
Without
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 bits12 bits
10 ms or more necessary
Computer
Inverter
Inverter
Computer
Data sending time (refer to the following formula)
Inverter data processing time
Data sending time (refer to the following formula)
Waiting time
(setting 10 ms)
Data check time
(depends on the
instruction code (see the
following table))
Time