PUMP_BOOST_CTRL Boost Control¶
Function Block PUMP_BOOST_CTRL
| Available as of PLC runtime system | V1.3 and above |
| Included in library | PUMP_AC500_V23.lib |
| Type | Function Block without historical values. |
This application Function Block provides a typical logic for pump boost operations with several pumps - where the user can select the operation mode i.e. single pump, multi pump or traditional pumping for up to three pumps. The switching on and off of further pumps is triggered via start and stop speeds.
With this Function Block the
- traditional / conventional (only one pump with drives, other DOL* motors) and
- advanced (all pumps operated by drive-motors) pumping stations can be configured and operated. (* DOL = direct online: Motor without a drive but a switch or soft-starter connected to e.g. 50Hz AC line voltage).
PUMP_PID uses the speed reference based on the process demands to PUMP_BOOST_CTRL. PUMP_BOOST_CTRL controls the start/stop sequence for the pumps based on the start and stop speeds to fullfill process requirements.
Follower Modes in Boost Operation
The following pictures show the different control modes, resulting in different criteria how to run the followers. The follower mode itself is set in each PUMP_INTERFACE Block.
Note
The follower modes in each of the three PUMP_INTERFACE Blocks have to be set to the same mode.
Constant speed
Copy of “Master”/direct follower
“Master” Speed