Mitsubishi Electric FR-A700 Series, Technical Manual

Page: 414 / 550

448
PARAMETER
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.
(5) Response time
[Formula for data sending time]
Error
Code
Error Item Error Description Inverter Side Operation
H0 Computer NAK error
The number of errors consecutively detected in communication
request data from the computer is greater than allowed number of
retries.
Brought to trip (E. PUE/
E.SER) if error occurs
continuously more than the
allowable number of retry
times.
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.
Alternatively, 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 received data
H8 — — —
H9 — — —
HA Mode error
Parameter write was attempted the computer link operation mode,
operation command source is not selected or inverter operation.
Does not accept received data HB Instruction code error The specified command does not exist.
HC Data range error
Invalid data has been specified for parameter write, frequency
setting, etc.
HD — — —
HE — — —
HF — — —
10ms 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 10ms) Data check time
(depends on the
instruction code (see the
following table))
Time
1
Number of data
characters
(Refer to page 438)
Communication specifications
(total number of bits)
(Refer to the following.)
= Data send time (s) Communication
speed (bps)
Communication specifications
Name Number of Bits
Stop bit length
1 bits
2 bits
Data length
7 bits
8 bits
Parity check
Yes 1 bits
No 0
In addition to the above, 1 start bit is necessary.
Minimum number of total bits 9 bits
Maximum number of total bits12 bits
Data check time
Item Check Time
Various monitors, run command,
Set frequency (RAM)
12ms
Parameter read/write, frequency
setting (EEPROM)
30ms
Parameter clear/all clear
5s
Reset command No answer