Frequency Inverter DF51... - Moeller.com.tr

04/07 AWB8230-1541GB Reference and control signalinputsThree-wire control (STA – STP – F/R)Three-wire control is a <strong>com</strong>mon control method for machines: Twoinputs are used for start and stop pulses and a third for selectingthe direction of rotation.Through the digital inputs configured as STA, STP and F/R you canoperate the frequency inverter with three switches:• STA: Start signal• STP: Stop signal• F/R: Direction of rotationX In PNU A001 enter the value 02 (reference input throughPNU A020).X In PNU A002 enter the value 01 (start signal through digitalinputs).X In PNU A020 enter the reference frequency.If you want to start the inverter through the STA input, the STPinput must be enabled (inverse function, open-circuit protection).The signal must be applied for only a short period (pulse,f 50 ms). When the STP input is disabled, the motor stops. Whenthe F/R input is activated (pulse) the motor reverses.LF/RSTPSTA54321P24STASTPFigure 102:Digital input 3 configured as Pulse Start (STA), digitalinput 4 as Pulse Stop (STP) and digital input 5 as ReverseDirection (F/R).X Configure three of the digital inputs 1 to 5 as STA, STP and F/Rby entering the following values under the corresponding PNU(C001 to C005).– STA: 20– STP: 21– F/R: 22The frequency inverter accelerates to the reference frequencyspecified with PNU A020.Figure 103:hF/Rf oFWDREVFunction chart Pulse start STA, Pulse stop STP andDirection Reversal F/RWhen three-wire control is activated (STA-STP-F/R),functions 00 (FWD) and 01 (REV) are disabled.Table 25: Three-wire controlValue range PNU C001 to C006 State Description20 STA Three-wire control start signal ON Motor start through pulse• Reference input PNU F001 or A020• Acceleration time PNU F002OFFNo change in motor operation21 STP Three-wire control stop signal ON Required enable signal for motor operation.Wire breakage causes automatic motor stop.22 F/R Three-wire control, direction ofrotationOFFONOFFMotor stop through pulse(deceleration time PNU F003)Anticlockwise rotating field (REV)Clockwise rotating field (FWD)97