Fanuc alarm
The control counts the amplifiers on its fiber-optic servo loop (FSSB) at power up.
The control counts the amplifiers on its fiber-optic servo loop (FSSB) at power up. It found fewer than it expects.
Lock out the machine before reaching into it. Never bypass a door switch or interlock to clear an alarm.
If every amp is lit and the cables are good, a tech needs to find which amplifier has dropped off the loop.
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The control counts the amplifiers on its fiber-optic servo loop (FSSB) at power up. It found fewer than it expects.
An amplifier isn't getting control power (24V). Fiber optic cable unplugged, dirty or broken. Failed amplifier.
See if every amplifier's display is lit. Power off, then reseat each fiber optic connector. Never look into the end of a fiber. Look for a kinked or crushed fiber cable. If every amp is lit and the cables are good, a tech needs to find which amplifier has dropped off the loop.
Alarm numbers and text can differ by control model, software version and machine builder. This page is a starting point from people who have worked on these machines, not a replacement for your machine builder's manual.
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