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

Monitor display and monitor output signal4.16.4 Terminal FM, AM calibration (Calibration parameter C0 (Pr. 900), C1 (Pr. 901))By using the operation panel or parameter unit, you can calibrate terminal FM and terminal AM to full scaledeflection.ParameterNumber(1) FM terminal calibration (C0(Pr. 900))Name Initial Value Setting Range DescriptionC0(900) FM terminal calibration ⎯ ⎯Calibrate the scale of the meterconnected to terminal FM.C1(901) AM terminal calibration ⎯ ⎯Calibrate the scale of the analog meterconnected to terminal AM.*1 The parameter number in parentheses is the one for use with the parameter unit (FR-PU04/FR-PU07).*2 The above parameters allow its setting to be changed during operation in any operation mode even if "0" (initial value) is set in Pr. 77 Parameterwrite selection.⋅ The terminal FM is preset to output pulses. By setting the Calibration parameter C0 (Pr. 900), the meter connected tothe inverter can be calibrated by parameter setting without use of a calibration resistor.⋅ Using the pulse train output of the terminal FM, a digital display can be provided by a digital counter. The monitorvalue is 1440 pulses/s output at the full-scale value of the table on the previous page (Pr. 54 FM terminal functionselection).FMSDIndicator1mA full-scaleanalog meter1mA(+)(-)Calibrationresistor*18VDCT1FMSD1440 pulses/s(+)(Digital indicator)(-)T2Pulse width T1: Adjust using calibration parameter C0Pulse cycle T2: Set with Pr. 55 (frequency monitor)Set with Pr.56 (current monitor)*1 Not needed when the operation panel (FR-DU07) or parameter unit (FR-PU04/FR-PU07) is used for calibration.This resistor is used when calibration must be made near the frequency meter for such a reason as a remote frequency meter.Note that the needle of the frequency meter may not deflect to full-scale when the calibration resistor is connected. In this case, usethis resistor and operation panel or parameter unit together.*2 The initial settings are 1mA full-scale and 1440 pulses/s terminal FM frequency at 60Hz.⋅ Calibrate the terminal FM in the following procedure.1) Connect an indicator (frequency meter) across the terminals FM-SD of the inverter. (Note the polarity. Theterminal FM is positive.)2) When a calibration resistor has already been connected, adjust the resistance to "0" or remove the resistor.3) Refer to the output signal list (page 228) and set Pr. 54. When you selected the running frequency or inverteroutput current as the output signal, preset the running frequency or current value, at which the output signal willbe 1440 pulses/s, to Pr. 55 Frequency monitoring reference or Pr. 56 Current monitoring reference. At 1440 pulses/s,the meter generally deflects to full-scale.REMARKS⋅ When calibrating a monitor output signal, which cannot adjust to a 100% value without an actual load and a measurementequipment, set Pr.54 to "21" (reference voltage output) and make calibration. 1440 pulses/s are output from the terminal FM.⋅ The wiring length of the terminal FM should be 200m maximum.⋅⋅⋅CAUTIONThe initial value of the calibration parameter C0 (Pr. 900) is set to 1mA full-scale and 1440 pulses/s FM output frequency at60Hz. The maximum pulse train output of terminal FM is 2400 pulses/s.When a frequency meter is connected to across terminals FM-SD to monitor the running frequency, the FM terminal output isfilled to capacity at the initial setting if the maximum output frequency reaches or exceeds 100Hz. In this case, the Pr. 55 settingmust be changed to the maximum frequency.When Pr. 291 Pulse train I/O selection = "10, 11, 20, 21, 100" (high speed pulse train output), calibration using calibrationparameter C0 (Pr. 900) can not be made.236