Filter
Top Products
9 - 14
9 Power Backup System
MITSUBISHI CNC
9.4.4 Troubleshooting for Each Alarm No.
Alarm No.
8
Watchdog :
The system does not operate correctly.
Investigation details Investigation results Remedies
1
Check whether the PFU software version was
changed recently.
Changed. Change the S/W version back to the original.
Not changed. Check the investigation item No. 2.
2 Check the reproducibility.
The error is always repeated. Replace the power backup unit.
The state returns to normal once, but the error
occurs sometimes thereafter.
Check the investigation item No. 3.
3
Check if there is any abnormality in the unit's
ambient environment. (Ex. Ambient temperature,
noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
Alarm No.
10
Memory error 1 :
An internal memory error was detected during the power ON self-check.
Investigation details Investigation results Remedies
1 Check the reproducibility.
The error is always repeated. Replace the power backup unit.
The state returns to normal once, but the error
occurs sometimes thereafter.
Check the investigation item No. 2.
2
Check if there is any abnormality in the unit's
ambient environment. (Ex. Ambient temperature,
noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
Alarm No.
11
Memory error 2 :
An error was detected in the internal clock signal.
Investigation details Investigation results Remedies
1 Check the investigation items of the alarm No. 10.
Alarm No.
12
Unit ID error :
An error was detected in the internal hardware ID.
Investigation details Investigation results Remedies
1 Check the investigation items of the alarm No. 10.
Alarm No.
13
A/D converter error:
An error was detected in the A/D converter, which is used for detecting current and voltage.
Investigation details Investigation results Remedies
1 Check the investigation items of the alarm No. 10.
Alarm No.
18
Function selection error :
An error was detected in the settings of DIP or rotary switches.
Investigation details Investigation results Remedies
1
Check the settings of switches on the upper part of
the unit.
The switch setting is wrong (disabled setting). Set the switches correctly.
The switch settings are correct. Replace the power backup unit.
Alarm No.
19
External emergency stop setting error :
The external emergency stop cancel state was detected although the external emergency stop input is set as disabled.
Investigation details Investigation results Remedies
1
Check for a wiring error in connection to the DI1
terminal of CN43.
There is an error in wiring. Perform wiring correctly.
There is no error in wiring. Check the investigation item No. 2.
2 Check the reproducibility.
The error is always repeated. Replace the power backup unit.
The state returns to normal once, but the error
occurs sometimes thereafter.
Check the investigation item No. 3.
3
Check if there is any abnormality in the unit's
ambient environment. (Ex. Ambient temperature,
noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.