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7 Troubleshooting
MITSUBISHI CNC
Alarm No.
26
Unused axis error
A power module error occurred in the axis whose axis No. selection switch was set to "F" (free axis).
Investigation details Investigation results Remedies SV SP
1 Check the repeatability.
The error is always repeated. Replace the drive unit.
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The state returns to normal once, but 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.
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Alarm No.
27
Sub side encoder: Error 5
The machine side encoder (CN3 side) detected an error. As details differ for each encoder, refer to section "Encoder alarm".
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
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Alarm No.
28
Sub side encoder: Error 6
The machine side encoder (CN3 side) detected an error. As details differ for each encoder, refer to section "Encoder alarm".
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
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Alarm No.
29
Sub side encoder: Error 7
The machine side encoder (CN3 side) detected an error. As details differ for each encoder, refer to section "Encoder alarm".
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
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Alarm No.
2A
Sub side encoder: Error 8
The machine side encoder (CN3 side) detected an error. As details differ for each encoder, refer to section "Encoder alarm".
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
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Alarm No.
2B
Main side encoder: Error 1
The motor side encoder (CN2 side) detected an error.
(Note) It includes the linear scale in the case of linear motor.
As details differ for each encoder, refer to section "Encoder alarm".
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
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Alarm No.
2C
Main side encoder: Error 2
The motor side encoder (CN2 side) detected an error.
(Note) It includes the linear scale in the case of linear motor.
As details differ for each encoder, refer to section "Encoder alarm".
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
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Alarm No.
2D
Main side encoder: Error 3
The motor side encoder (CN2 side) detected an error.
(Note) It includes the linear scale in the case of linear motor.
As details differ for each encoder, refer to section "Encoder alarm".
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
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