pumpOn

pumpOn is a control signal used in pumping systems to indicate that a pump should be energized. In hardware and software, it is often a boolean variable or digital output that commands a pump drive, relay, or motor controller to start.

In hardware implementations, pumpOn energizes the device by closing a relay or enabling a transistor or solid-state drive. It is typically used together with a corresponding pumpOff signal and may be combined with safety interlocks, timers, or logic to prevent rapid cycling.

In software and programmable logic, pumpOn appears as a state or command that gates the energization of the pump. It is commonly used in control loops that monitor sensors such as pressure, level, or flow, and it may be subject to debouncing, hysteresis, and fault handling.

Common applications include irrigation systems, water treatment and supply, chemical dosing, HVAC refrigerant circuits, and industrial process plants. The exact definition of pumpOn can vary by platform, from a simple on/off flag to an edge-triggered control event.

Safety and reliability considerations include inrush current, motor protection, electrical isolation, correct wiring of relays or contactors, and a known default state in power loss. Clear documentation of when pumpOn is asserted helps avoid unintended starts.

See also: pumpOff, relay, motor controller, VFD, PWM, PLC, sensor.