Mitsubishi Electric FR-E700EX Instruction Manual page 215

7) Error code
If any error is found in the data received by the drive unit, 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
HC Data range error

HD

HE

HF
(5) Response time
Computer
Drive unit
Drive unit
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 bits ................12 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 drive unit.
The data received by the drive unit 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 drive unit
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 drive unit operation.
The specified command does not exist.
Invalid data has been specified for parameter write, speed setting,
etc.
Data sending time (refer to the following formula)
Drive unit data processing time = waiting time + Data check time
10ms or more necessary
Data sending time (refer to the following formula)
Number of data characters

(Refer to page 210)
Number of Bits
1 bit
2 bits
7 bits
8 bits
Present 1 bit
Absent 0
Communication operation and setting
Error Description






(Setting 10ms)
(depends on the instruction
code (see the following table))
Time
Communication

(Total number of bits) = data send time (s)
(Refer to the following.)
Data check time
Item
Various monitors, operation command,
speed setting (RAM)
Parameter read/write, speed setting
(EEPROM)
Parameter clear/all clear
Reset command
Drive Unit Operation
Brought to trip (E. PUE) if
error occurs continuously
more than the allowable
number of retry times.

Does not accept received
data but is not brought to trip.


Does not accept received
data but is not brought to trip.



Check Time
< 12ms
< 30ms
< 5s
No answer
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