Okuma Alarm A-1132 – VDU Communication Error
Okuma Alarm A-1132 indicates a communication problem between the CNC control and the VDU (Vibration Detect Unit).
This alarm appears when the control system cannot communicate correctly with the vibration detection module.
The VDU (Vibration Detect Unit) monitors machine vibration and acceleration signals. These signals help the control system detect abnormal vibration levels that could indicate problems with the spindle, tool, or machine structure.
If the communication link between the CNC control and the VDU fails, the system cannot receive vibration data and triggers Alarm A-1132.
Possible causes
Several issues may cause this alarm:
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Communication failure between the VDU module and the CNC control
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Damaged or loose communication cable
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Power supply problem to the VDU unit
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Faulty VDU electronic module
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Internal CNC control communication error
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Connector or wiring problems
What happens when this alarm appears
When Alarm A-1132 occurs, the machine control cannot receive vibration data from the VDU system.
Depending on the machine configuration, vibration monitoring may be disabled or certain operations may be stopped to prevent potential machine damage.
Recommended actions
To troubleshoot this alarm, the following steps are usually recommended:
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Restart the CNC machine and check if the alarm returns.
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Inspect the communication cables between the VDU module and the control.
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Check connectors and wiring for loose or damaged contacts.
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Verify that the VDU unit is receiving proper power.
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If necessary, test or replace the VDU module.
Professional repair service
If the alarm continues to appear, the problem may be related to a faulty electronic module or communication interface.
Our technicians specialize in Okuma CNC electronics diagnostics and repair, including VDU modules, control boards, and servo system components.
