126 Control macros
Example of a 3-pump constant pressure water supply application:
Pump 1 - connected to VSD motor
Pump 2 - connected to auxiliary motor 1
Pump 3 - connected to auxiliary motor 2
Flow consumption versus pump status
Consumption
Pump 1
Pump 2
Pump 3
Low
↓
High
↓
Low
VSD
Off
Off
VSD
DOL
Off
VSD
DOL
DOL
VSD
DOL
Off
VSD
Off
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...