GE VAT2000 Instruction Manual

Also see for VAT2000 Series: Instruction manual Instruction manual

Contents

6. Control Functions and Parameter Settings6-51Other restrictions related to the pump’s ON/OFF control are given below.(6) When the PID output reaches LLT, the pumps will sequentially turn OFF from thepump having the longest operation time. However if there are no pumps to turn OFF,the VAT2000 will stop. When the PID output rises and leaves LLT, the VAT2000 willresume operationO N(6 )O NO NS top R e startO pe ra tio ntim eT 1L LTP ID O utpu tP S O 1(p um p 1)P S O 2(p um p 2)P S O 3(p um p 3)T 1 T 1 T 1VAT 20 0 0VAT2000 automatic operation (three ON/OFF control pumps)(7) When the operating VAT2000’s command (RUN) turns OFF, all commands for thepump function will simultaneously turn OFF.(8) If a fault occurs in the inverter, the following operation will take place.• As long as the operating command RUN is held in ON state, the pump´s controlON/OFF will be held. Equalisation of each pump´s operation time will also becontinued.• When the operating command RUN turns OFF, all commands for the pump willsimultaneously turn OFF.(9) When the inverter’s power is turned OFF, the operation time history for each pump willbe lost.2) Preparation for operation(1) Set the number of pumps to be ON/OFF controlled in parameter B44-0.One to five pumps can be set. The relation of the pump No. recognised in the inverterand the output terminals is as follows.PUMP No. Relay output terminals1 PSO12 PSO23StandardPSO34 PSO45 Option PSO5The pumps are started in the order of pump No. 1 to 5.The digital outputs not being used for ON/OFF control can be used as normalprogrammable outputs.