Mitsubishi Electric MELSEC iQ-F Series Quick Connection Manual page 33

6. TROUBLESHOOTING
Checking the
Checking Procedure
LED Status
Error code
(Hexadecimal)
0000H Normal end
7601H -
7602H Timeout error
Station number
7603H
error
7604H Sum check error
Sending timeout
7608H
error
7609H Receive data error
Computer NAK
7620H
error
7621H Parity error
7622H Sum check error
7623H Protocol error
7624H Framing error
7625H Overrun error
7627H Character error
762AH Mode error
Instruction code
762BH
error
762CH Data range error
The following table lists the error codes stored in SD8500.
For details on the error codes, refer to
Section 5.9 Troubleshooting in the MELSEC iQ-F FX5 User's Manual (Serial Communication)
Checking the
Error Code
Description
(No Errors)
No response from the inverter.
Sending from inverter was aborted midway.
An unspecified station gave response.
The sum of data sent back by the inverter did not
match.
Sending to the inverter was not completed within the
specified time.
Wrong data was received from the inverter.
Inverter sent the error code H0.
The number of retries exceeded the allowable number
because of an error in the transfer request data.
Inverter sent the error code H1.
The contents are different from the specified parity.
Inverter sent the error code H2.
The sum check code in the computer is different from
the sum value calculated from the data received by the
inverter.
Inverter sent the error code H3.
There is a syntax error in data received by the inverter.
Or, data reception is not completed within a certain
amount of time. CR/LF does not match parameter
setting.
Inverter sent the error code H4.
The stop bit length is different from the initial set value.
Inverter sent the error code H5.
Before receiving the completed data in the inverter, the
computer sent the next set of data.
Inverter sent the error code H7.
An unused character (other than 0 to 9, A to F and
control codes) was received.
Inverter sent the error code HA.
A parameter was written in a mode other than
computer link operation mode, or while the inverter
was operating.
Inverter sent the error code HB. Non-existing
instruction code was specified.
Inverter sent the error code HC.
In writing a parameter or operation frequency, data
outside the allowable range was specified.
Cause and action
Programmable
Inverter
controller
-
Check the wiring and parameter settings.
Check the wiring and Check the wiring and
parameter settings. existence of noise.
Check Pr.117 (PU
Check the
communication station
parameter settings.
number) setting.
Check the
parameter settings
Check the parameter
and operating
settings, wiring, and
environment
existence of noise.
(including existence
of noise).
Check Pr.120 (PU
communication
parity check) setting.
Check the
parameter settings.
Check the wiring
and existence of
noise.
Check the program. -
Check the wiring,
existence of noise, -
or other factors.
Check the operation
mode and operation
command source,
such as Pr.77, Pr.79,
and Pr.340, of the
inverter.
Check the program.
-
(JY997D55901).
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