Mitsubishi Electric R60AD8-G - List of Alarm Codes

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3 TROUBLESHOOTING
3.5 List of Alarm Codes
3.5 List of Alarm Codes
If an alarm occurs during operation, the A/D converter module stores the alarm code into 'Latest alarm code' (Un\G2) of the
buffer memory. Turning on 'Error clear request' (YF) clears the alarm code of 'Latest alarm code' (Un\G2).
 in alarm codes: This symbol indicates the number of the channel where an alarm has occurred. A numerical value of 0 to F
is used to correspond to CH1 to CH16.
(CH1: 0, CH2: 1, CH3: 2, CH4: 3, CH5: 4, CH6: 5, CH7: 6, CH8: 7, CH9: 8, CH10: 9, CH11: A, CH12: B, CH13: C, CH14: D,
CH15: E, CH16: F)
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 set range. As a result, the corresponding bit of
CH Alert output flag (process alarm upper limit)
or CH Alert output flag (process alarm lower
limit) and 'Alert output signal' (X8) turn off.
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 set 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' (X8) turn
off.
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.
The following operations are performed by turning
on and off 'Error clear request' (YF) after the
analog input value returns within the setting range.
• All the bits of CH Input signal error detection
flag are set to Normal (0).
• 'Input signal error detection signal' (XC) turns
off.
• 'Latest alarm code' (Un\G2) is cleared.
091H Input signal error detection
(lower limit)
An input signal error (lower limit) has been detected
in CH.
0A0H Input signal error detection
(disconnection)
An input signal error (disconnection) has been
detected in CH.