Mitsubishi Electric A1SJ71DN91 User Manual page 89

8. TROUBLESHOOTING
Error Error
Code Detected
A fault has been detected with the network after
01 DN91
H
communication being started.
1E DN91 The slave station did not respond.
H
Slave The slave station responded with an error that is
20
H
station not defined.
Slave The slave station responded with an error when
23
H
station establishing a connection.
Input data size of the parameters differs from the
24 DN91
H
size of the actual slave station
Output data size of the parameters differs from the
25 DN91
H
size of the actual slave station.
Received response data for the function that is not
26 DN91
H
supported by DN91.
Slave
27 The connection is already in the designated mode.
H
station
Unexpected illegal data has been received when
28 DN91
H
establishing a connection.
Slave Connection is already established with the slave
29
H
station station.
Polling response data length differs from the
length of data that has been read from the slave
2A DN91
H
station when establishing a connection.
The first division data has been received twice
2B DN91
H
during divided receipt of polling response.
Division data number that has been received is
not what is expected during divided receipt of
2C DN91
H
polling response.
Intermediate or the last data has been received
2D DN91 before receiving the first division data during
H
divided receipt of polling response.
Two or more station numbers of the same MAC ID
3B DN91
H
have been detected in the parameters.
45 DN91 O-address in the parameters exceeds 255.
H
46 DN91 I-address in the parameters exceeds 255.
H
47 DN91 Illegal connection type is designated.
H
The value of the expected packet rate is less than
49 DN91
H
that of the production inhibit time.
(3) In case the error-detected station number (lower byte of the error information) is any
value other than FF
H
Details
and FE :
H
• Check if cables are properly connected.
• Inspect the state of the network and slave stations
closely: Are MAC IDs and baud rate properly set?
Any faulty slave stations? Any missing terminal
resistance? etc.
• Read the communication error information, and take
remedial actions thereupon.
• Read the communication error information, and take
remedial actions thereupon.
• Refer to the operation manual of the slave station,
and set a proper input data size.
• Refer to the operation manual of the slave station,
and set a proper output data size.
• Refer to the operation manual of the slave station,
and avoid sending from the slave station any function
that is not supported by DN91.
• Inspect the state of the network and slave stations
closely as for any missing terminal resistance.
• Inspect the state of the network and slave stations
closely as for any missing terminal resistance.
• Inspect the state of the network and slave stations
closely as for any missing terminal resistance.
• Wait and observe for a while, and if the connection is
not established, reset the slave station.
• Inspect the state of the network and slave stations
closely as for any missing terminal resistance.
• Inspect the state of the network and slave stations
closely as for any missing terminal resistance.
• Inspect the state of the network and slave stations
closely as for any missing terminal resistance.
• Inspect the state of the network and slave stations
closely as for any missing terminal resistance.
• The parameters contain two or more slave stations
having the same station number. Correct the station
numbers.
• The parameters contain slave station(s) of the same
station number as the host station number.
• Set the O-address at 255 or less.
• Set the I-address at 255 or less.
• Check if the connection type value is correct.
• Set the expected packet rate value greater than that
of the production inhibit time.
−
8 10
MELSEC-A
Remedy