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.
Summary of Contents for ACS560
Page 1: ...ABB GENERAL PURPOSE DRIVES ACS560 standard control program Firmware manual...
Page 4: ...4...
Page 30: ...30 Start up control with I O and ID run...
Page 32: ...32 Using the control panel...
Page 100: ...100 Program features...
Page 153: ...Control macros 153...
Page 160: ...160...
Page 374: ...374 Parameters...
Page 408: ...408 Additional parameter data...
Page 466: ...466 Fieldbus control through the embedded fieldbus interface EFB...
Page 504: ...504 Control chain diagrams...
Page 508: ...508 Parameterization with drive composer...
Page 512: ...512 Parameterization with automation builder drive manager...