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A049 alarm in siemens master drive

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Cause : No slave comes when at serial I/O (SCB1 with SCI1/2), no slave is connected or fiber-optic cable is interrupted or slaves are without voltage.

The A049 alarm in siemens master drive indicate No slave condition. This means serial I/O (SCB1 with SCI1/2), no slave is connected, opto-cable interrupted or slaves have no power.

  • P660 SCI AE configurations:
    • Check slave
    • Check cable
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