: Most PPC-R faults are related to the Sercos ring. Ensure all fiber optic connectors are seated firmly and the "send/receive" lights are active.
: Note the specific alpha-numeric code on the PPC faceplate.
The PPC controller monitors all connected drives. If a drive fails, the PPC reflects that status.
If you see an F8 or general memory error, replace the 3V lithium battery while the system is powered on (if the manual allows) to prevent losing the program. When to Seek Repair or Replacement
For Sercos-based errors (E802), check the fiber optic cables for kinks, dust on the connectors, or cracks.