Machine Protection6- 53 Changing Stall Prevention Level during Operation Using an Analog InputIf you set H3-09 (Multi-function Analog Input Terminal A2 Function Selection)to 8 (stall prevention level during run), you can change thestall level during operation by setting H3-10 [Gain (Terminal A2)] and H3-11 [Bias (Terminal A2)]The stall prevention level during operation enabled is the multi-function analog input terminal A2 inputlevel or the set value in constant L3-06, whichever is the smaller.Fig 6.38 Stall Prevention Level during Operation Using an Analog Input Using Frequency DetectionSet these constants when outputting one of the frequency agree or frequency detection signals from a multi-function output.INFOIf the motor capacity is smaller than the Inverter capacity or the motor stalls when operating at the factory set-tings, lower the stall prevention level during operation.Con-stantNumberName Description SettingRangeFactorySettingChangeduringOpera-tionControl Methods MEMOBUSRegis-terV/fV/fwithPGOpenLoopVec-torFluxVec-torL4-01Speed agree-ment detec-tion levelEffective when “Desired fre-quency (ref/setting) agree 1,”“Frequency detection 1,” or“Frequency detection 2" is setfor a multi-function output.Frequencies to be detected areset in Hz units.0.0 to400.0*10.0 Hz No A A A A 499H0.0 to300.0*2L4-02Speed agree-ment detec-tion widthEffective when “Frequency(speed) agree 1,” “Desired fre-quency (speed) agree 1,” or“Frequency (FOUT) detection1,” Frequency (FOUT) detection2 is set for a multi-function out-put.Sets the frequency detectionwidth in Hz units.0.0 to20.0 2.0 Hz No A A A A 49AHor H3-05 (Multi-functionAnalog Input Terminal A3 Function Selection)or H3-06 [Gain (Terminal A3)] and H3-07 [Bias (Terminal A3)or A3Stall prevention level during operationMulti-function analog inputterminal A2, A3 input level(4 mA) (8.8 mA) (20 mA)When using flux vector control, the motor speed is detected.
