130 Control macros
pump one by one, but the auxiliary motor is always is on-line in DOL mode.
Two pumps meet the flow consumption for long term running and the 3rd pump is
reserved for shifting. All the motors shifts for autochange routine and special
auxiliary circuit is needed for the same. This system is similar to the SPFC.
Example of PFC autochange with all motors in a 3-pump constant pressure water
supply application:
Pump 1 - connected to Motor 1
Pump 2 - connected to Motor 2
Pump 3 - connected to Motor 23
Flow consumption versus pump status
Consumption
Pump 1
Pump 2
Pump 3
Low
VSD
Off
Off
Normal
VSD
DOL
Off
↓
Off
VSD
DOL
↓
DOL
Off
VSD
Normal
VSD
DOL
Off
VSD
Variable Speed Drive (yellow colour connecting line in the figure).
Controlled by drive, tuning the output speed according to PID control.
DOL
Direct On Line (red colour connecting line in the figure). Pump is running
at fixed motor nominal speed.
Off
Off-line. Pump stops.
Содержание ACS560
Страница 1: ...ABB GENERAL PURPOSE DRIVES ACS560 standard control program Firmware manual...
Страница 4: ...4...
Страница 30: ...30 Start up control with I O and ID run...
Страница 32: ...32 Using the control panel...
Страница 100: ...100 Program features...
Страница 153: ...Control macros 153...
Страница 160: ...160...
Страница 374: ...374 Parameters...
Страница 408: ...408 Additional parameter data...
Страница 466: ...466 Fieldbus control through the embedded fieldbus interface EFB...
Страница 504: ...504 Control chain diagrams...
Страница 508: ...508 Parameterization with drive composer...
Страница 512: ...512 Parameterization with automation builder drive manager...