117Function assignment of externalterminal and control4PARAMETERS(2) Response time of each signal⋅The response time of the X10 signal is within 2ms. However, when the X10 signal is not assigned at the Pr. 30Regenerative function selection setting of "2" (FR-HC/MT-HC/FR-CV connection), the response time of the MRSsignal is within 2ms. Pr. 17 MRS input selection is made invalid.4.10.2 Inverter output shutoff signal (MRS signal, Pr. 17)Pr. 30SettingMRS AssignmentX10 AssignmentResponse TimePr. 17MRSX102{×Within 2ms⎯Invalid×{⎯Within 2ms⎯{{Within 20ms Within 2ms ValidOther than 2{×Within 20ms⎯Valid×{⎯⎯⎯{{Within 20ms⎯ValidThe inverter output can be shut off from the MRS signal. The logic of the MRS signal can also be selected.Parameter NumberNameInitial ValueSetting RangeDescription17 MRS input selection00 Open input always2 Close input always (NC contact input specifications)The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 175)(1) Output shutoff signal (MRS signal)⋅Turning on the output shutoff signal (MRS) during inverter runningshuts off the output immediately.⋅Terminal MRS may be used as described below.(a) When mechanical brake (e.g. electromagnetic brake) is used tostop motorThe inverter output is shut off when the mechanical brakeoperates.(b) To provide interlock to disable operation by the inverterWith the MRS signal on, the inverter cannot be operated if thestart signal is entered into the inverter.(c) Coast the motor to a stop. When the start signal is turned off, the inverter decelerates themotor to a stop in the preset deceleration time, but when the MRSsignal is turned on, the motor coasts to a stop.(2) MRS signal logic inversion (Pr. 17)⋅When Pr. 17 is set to "2", the MRS signal (output stop) can bechanged to the normally closed (NC contact) input specification.When the MRS signal turns on (opens), the inverter shuts off theoutput.REMARKS⋅The MRS signal is assigned to the terminal MRS in the initial setting. By setting "24" in any of Pr. 178 to Pr. 189 (input terminalfunction selection), the RT signal can be assigned to the other terminal.⋅The MRS signal can shut off the output, independently of the PU, external or network operation mode.CAUTION⋅Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Pleasemake setting after confirming the function of each terminal.♦ Parameters referred to ♦Pr. 178 to Pr. 189 (Input terminal function selection) Refer to page 115ONONMRS signalSTF (STR) signalMotor coasts to stopTime(Initial value)Output stopOutput stopMRSInverterMRSInverterSetting value "0"Setting value "2"SD SD118Function assignment of external terminal and control4.10.3 Condition selection of function validity by the second function selection signal (RT) (RT signal, Pr. 155)⋅When the RT signal turns on, the second function becomes valid.⋅The second function has the following applications.(a) Switching between normal use and emergency use(b) Switching between heavy load and light load(c) Changing of acceleration/deceleration time by broken line acceleration/deceleration(d) Switching of characteristic between main motor and sub motor⋅Functions that can be set as second functionsYou can select the second function using the external terminal (RT signal).You can also set the RT signal operation condition (reflection time).Parameter NumberNameInitial ValueSetting RangeDescription155RT signal function validity condition selection00Second function is immediately valid with on of the RT signal.10Second function is valid only during the RT siganl is on and constant speed operation. (invalid during acceleration/deceleration)The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 175)Second function connection diagramSecond acceleration/deceleration time exampleFunctionFirst Function Parameter NumberSecond Function Parameter NumberRefer to PageTorque boost Pr. 0 Pr. 46 74Base Frequency Pr. 3 Pr. 47 84Acceleration time Pr. 7 Pr. 44 96Deceleration time Pr. 8 Pr. 44, Pr. 45 96Electronic thermal relay function Pr. 9 Pr. 51 101Stall prevention Pr. 22 Pr. 48, Pr. 49 77Output frequency detection Pr. 42(Pr. 43) Pr. 50 125REMARKS⋅The RT signal is assigned to the RT terminal in the initial setting. By setting "3" in any of Pr. 178 to Pr. 189 (input terminal functionselection), the RT signal can be assigned to the other terminal.⋅When the RT signal is on, the other functions such as the second acceleration/deceleration time are also selected.CAUTION⋅Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Pleasemake setting after confirming the function of each terminal.♦ Parameters referred to ♦Pr. 178 to Pr.189 (input terminal function selection) Refer to page 115STF(STR)InverterStartSecond function selectionRTHigh speedRHMiddle speedRMSD(initial value)RTOutput frequencySetting value "0"RHRMAcceleration time is reflectedTime119Function assignment of externalterminal and control4PARAMETERS4.10.4 Start signal selection (STF, STR, STOP signal, Pr. 250)The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 175)(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 88)⋅When Pr. 250 is set in any of "1000 to 1100, 8888", the STF signal becomes a start command and the STR signal aforward/reverse command.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 112 for stop selection)Parameter NumberNameInitial ValueSetting RangeDescriptionStart Signal (STF/STR)Stop Operation(Refer to page 112)250 Stop selection99990 to 100sSTF signal: Forward rotation startSTR signal: Reverse rotation startThe motor is coasted to a stop when the preset time elapses after the start signal is turned off. When the setting is any of 1000s to 1100s, the inverter coasts to a stop in (Pr. 250 - 1000)s.1000s to 1100sSTF signal: Start signalSTR signal: Forward/reverse rotation signal9999STF signal: Forward rotation startSTR signal: Reverse rotation startWhen the start signal is turned off, the motor decelerates to stop.8888STF signal: Start signalSTR signal: Forward/reverse rotation signal2-wire connection example (Pr. 250 = "9999")2-wire connection example (Pr. 250 = "8888")REMARKS⋅When Pr. 250 is set in any of "0 to 100, 1000 to 1100", the motor coasts to a stop if the start command is turned off. (Refer to page112)⋅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.Forward rotation startReverse rotation startSTFONTimeSTFSTRInverterOutput frequencyONSTR1025Forward rotationReverse rotationSDStart signalForward/reverse signalSTFTimeSTFSTRInverterOutput frequencySTR1025Forward rotationReverse rotationONONSD120Function assignment of external terminal and control(2) 3-wire type (STF, STR, STOP signal)⋅A 3-wire type connection is shown below.⋅The start self-holding selection becomes valid when the STOP signal is turned on. In this case, the forward/reverserotation signal functions only as a start signal.⋅If the start signal (STF or STR) is turned on and then off, the start signal is held and makes a start. When changingthe direction of rotation, turn STR (STF) on once and then off.⋅To stop the inverter, turning off the STOP signal once decelerates it to a stop.(3) Start signal selection3-Wire Type Connection Example (Pr. 250 ="9999")3-Wire Type Connection Example (Pr. 250 ="8888")REMARKS⋅The STOP signal is assigned to the terminal STOP in the initial setting. By setting "25" in Pr. 178 to Pr. 189, the STOP signal can also be assigned to the other terminal.⋅When the JOG signal is turned on to enable jog operation, the STOP signal becomes invalid.⋅If the MRS signal is turned on to stop the output, the self-holding function is not canceled.STFSTRPr. 250 Setting Inverter Status0 to 100s, 99991000
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