FR-A701 INSTRUCTION MANUAL (Applied) - Automation Systems ...

4PARAMETERSFunction assignment of external terminal and control4.15.4 Start signal operation selection (STF, STR, STOP signal, Pr. 250)You can select the operation of the start signal (STF/STR).Used to select the stopping method (deceleration to a stop or coasting) when the start signal turns off.Used to stop the motor with a mechanical brake, etc. together with switching off of the start signal.(Refer to page 188 for stop selection)ParameterNumberNameInitialValue250 Stop selection 9999SettingRange0 to 100s1000s to1100s99998888DescriptionStop operationStart signal (STF/STR)(Refer to page 188)STF signal: Forward rotationstartSTR signal: Reverse rotationstartSTF signal: Start signalSTR signal: Forward/reverserotation signalSTF signal: Forward rotationstartSTR signal: Reverse rotationstartSTF signal: Start signalSTR signal: Forward/reverserotation signalThe motor is coasted to a stopwhen the preset time elapsesafter the start signal is turnedoff. When the setting is any of1000s to 1100s, the invertercoasts to a stop in (Pr. 250 -1000)s.When the start signal is turnedoff, the motor decelerates tostop.(1) 2-wire type (STF, STR signal)⋅ A two-wire type connection is shown below.⋅ In the initial setting, the forward/reverse rotation signals (STF/STR) are used as start and stop signals. Turn oneither of the forward and reverse rotation signals to start the motor in the corresponding direction. If both are turnedoff (or on) during operation, the inverter decelerates to a stop.⋅ The speed setting signal may either be given by entering 0 to 10VDC across the speed setting input terminal 2-5,by setting the required values in Pr. 4 to Pr. 6 Multi-speed setting (high, middle, low speeds), etc. (For multi-speedoperation, refer to page 148)⋅ When Pr. 250 is set to any of "1000 to 1100, 8888", the STF signal becomes a start command and the STR signal aforward/reverse command.Forwardrotation startReverserotation startSTFSTRSD1025InverterStart signalForward/reversesignalSTFSTRSD1025InverterOutput frequencyForwardrotationReverserotationSTFSTRONONTime2-wire connection example (Pr. 250 = "9999") 2-wire connection example (Pr. 250 = "8888")Output frequencyForwardrotationReverserotationSTFSTRONONTimeREMARKS⋅ When Pr. 250 is set to any of "0 to 100, 1000 to 1100", the motor coasts to a stop if the start command is turned off. (Refer to page188)⋅ The STF and STR signals are assigned to the STF and STR terminals in the initial setting. The STF signal can be assigned toPr. 178 STF terminal function selection and the STR signal to Pr. 179 STR terminal function selection only.211