axismd.ai
Okuma OSP Controller
Servo/Axis · Intermediate
Okuma OSP Alarm B 2684 - MCS Rotary encoder 5 error
The MCS drive system detected illegal or invalid data coming from rotary encoder 5 (an auxiliary/other encoder) on the axis named in the alarm object. The axis cannot be trusted for positioning until the encoder signal is restored.
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Okuma OSP Alarm B 2684 - MCS Rotary encoder 5 error
MCS Rotary encoder 5 error
The MCS drive system detected illegal or invalid data coming from rotary encoder 5 (an auxiliary/other encoder) on the axis named in the alarm object. The axis cannot be trusted for positioning until the encoder signal is restored.
Common Causes
- Failed rotary encoder 5 unit
- Damaged encoder cable or loose connector between encoder and drive
- Electrical noise or contamination on the encoder read head
- Incorrect encoder mounting after mechanical work
Troubleshooting Steps
- 1Note the axis named in the alarm object and locate rotary encoder 5 on that axis; inspect the encoder cable and connector for damage, pinching or oil contamination and reseat the connector.
- 2Check the encoder mounting and coupling for looseness or recent mechanical disturbance that could corrupt its output data.
- 3Swap or substitute the encoder cable with a known-good cable if available to rule out a wiring fault before condemning the encoder.
- 4If the alarm remains after cable checks, replace rotary encoder 5 with the correct unit as the manual's corrective action directs, then cycle power and verify the axis positions correctly.
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