Interlocks. All the interlock levels shall be available in local or remote. The supplier shall provide the complete list of the interlocks. The PLC shall store a historic of at least the last eight trips of the modulator indicating what fault caused each trip. These interlock occurrences shall be stored with a REAL time and date marker. The following interlocks shall be hardwired into the system (and individually be identifiable) and not rely on just a software interlock to shut off the modulator:
