Mitsubishi MELSEC iQ-F, User Manual

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9 TROUBLESHOOTING
9.4 List of Alarm Codes
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9
9.4
List of Alarm Codes
If an alarm occurs during operation, a multiple input module stores the alarm code into 'Latest alarm code' (Un\G2) of the
buffer memory. Turning on ‘Error clear request’ (Un\G70, b15) clears the alarm code in 'Latest alarm code' (Un\G2).
The following table lists the alarm codes that may be stored.
 : This symbol indicates the number of the channel where an alarm has occurred. A numerical value of 0 to 7 is used to
correspond to CH1 to 8.
(CH1: 0, CH2: 1, CH3: 2, CH4: 3, CH5: 4, CH6: 5, CH7: 6, CH8: 7)
1ED  H Setting Input type/range
(offset/gain setting) error The "Setting Input type/range (Offset/gain
setting)" for the specified channel is set to the
factory default setting when Channel change
request (Un\G70, b11) has been turned on. Set the "Setting Input type/range (Offset/gain
setting)" for the specified channel to the user range
setting again.
1EF  H User range setting input type
mismatch error The presently set input type differs form the
input type stored in the flash memory when the
"Setting Input type/range (Offset/gain setting)"
is set to the "User range setting". Set the input type to be used as the offset/gain
setting.
1F08H Module power supply error The 24 V DC power supply is not normally
supplied to the multiple input module. Check the wiring of the cable or the supplied
voltage. After the check, turn off
→ on → off Error clear
request (Un\G70, b15) to eliminate this error and
resume the conversion.
If the error occurs again, the possible cause is a
failure of the module. Please consult your local
Mitsubishi representative.
3001H Hardware failure (moderate) A hardware failure (moderate) has occurred in
the multiple input module. Power off
→
on the module. If the error occurs again,
the possible cause is a failure of the module. Please
consult your local Mitsubishi representative.
3030H Flash memory error The data in the flash memory is abnormal. Check the digital output values. If the values are
abnormal, please consult your local Mitsubishi
representative.
Alarm code Alarm name Description and cause Corrective action
080  H Process alarm (upper limit) The process alarm (upper limit) has occurred in
CH
 .
Adjust CH  Digital operation value to fall within the
range. As a result, the corresponding bit of CH 
Alert output flag (Process alarm upper limit) and/or
CH
 Alert output flag (Process alarm lower limit),
and Alert output signal (Un\G69, b8) turn off
automatically.
081  H Process alarm (lower limit) The process alarm (lower limit) has occurred in
CH
 .
082  H Rate alarm (upper limit) The rate alarm (upper limit) has occurred in
CH
 .
Adjust the change rate in CH  Digital output value
to fall within the range. As a result, the
corresponding bit of CH
 Alert output flag (Rate
alarm upper limit) or CH  Alert output flag (Rate
alarm lower limit), and Alert output signal (Un\G69,
b8) turn off automatically.
083  H Rate alarm (lower limit) The rate alarm (lower limit) has occurred in
CH
 .
090  H Input signal error detection
(upper limit) An input signal error (upper limit) has been
detected in CH
 .
Adjust the analog input value to fall within the range,
and then turn off
→ on → off Error clear request
(Un\G70, b15). As a result, the corresponding bit of
Input signal error detection flag and Input signal
error detection signal turn off.
091

H Input signal error detection
(lower limit) An input signal error (lower limit) has been
detected in CH

.
092  H Input signal error detection
(simple disconnection) An input signal error (simple disconnection) has
been detected in CH
 .
0A0  H Disconnection detection Disconnection has been detected in CH  . Re-establish the connection and turn off → on → off
Error clear request (Un\G70, b15). As a result, the
corresponding bit of Disconnection detection flag,
and Disconnection detection signal (Un\G69, b6)
turn off, and the alarm code of Latest alarm code is
cleared.
Error code Error name Description and cause Corrective action