The Vertex-Pro controller includes the following PID control & protection functions:

 Anti-Surge PID Control

 Rate PID Control

 Boost (open-loop backup line response)

 Surge Recovery

 Surge Minimum Position

 Start, Purge, Stop, Shutdown, & Zero Speed Sequencing Positions

 Alarm & Shutdown Logic

Alternatively, the following functions can be configured, depending on the application requirements:

Motor

 Current limit PID Control

 Start Sequence Logic

Compressor

 Throttle or Inlet Guide Vane Ramp Loading (motor protection)

 Performance Control (compressor suction or discharge pressure, flow, or external signal)

 Load Sharing (parallel compressors up to three trains)