Terminal Ca, Am Calibration (Calibration Parameter C0 (Pr. 900), C1 (Pr. 901), C8 (Pr.930) To C11 (Pr. 931)) - Mitsubishi Electric FR-F740-00023-EC Instruction Manual

3.10.4 Terminal CA, AM calibration
(Calibration parameter C0 (Pr. 900), C1 (Pr. 901), C8 (pr.930) to C11 (Pr. 931))
By using the operation panel or parameter unit, you can calibrate terminal CA and terminal AM to full scale
deflection.
Parameter
Name
Number
C0(900) CA terminal calibration
C1(901) AM terminal calibration
C8(930) Current output bias signal
C9(930) Current output bias current
C10(931) Current output gain signal
C11(931) Current output gain current
*1 The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 146.)
*2 The parameter number in parentheses is the one for use with the parameter unit (FR-PU04).
*3 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
Parameter write selection.
(1) CA terminal calibration (C0(Pr. 900), C8(Pr. 930) to C11(Pr. 931) )
0 to 20mADC
CA
5
Analog output current
(CA)
C0(Pr.900) 20mA
100%
0
Output signal value
for zero analog current output
(C8(Pr.930))
Analog current output value for zero output signal
(C9(Pr.930))
⋅ Calibrate CA terminal in the following procedure.
1)Connect a 0-20mADC meter (DC ammeter) to across inverter terminals CA-5. (Note the polarity.Terminal CA
is plus.)
2)Set calibration parameters C8(Pr. 930) to C11 (Pr. 931) to initial values. (When the meter needle does not point
to 0, calibrate using C8(Pr. 930) and C9(Pr. 930))
3)Refer to the output signal list (page 110) to set Pr. 54.
When running frequency, inverter output current or the like has been selected as the output signal, preset in
Pr. 55 or Pr. 56 the running frequency or current value at which the output signal is 20mA.
4)Run the inverter. (The inverter may be run in either the PU or external operation mode.)
5)Use calibration parameter C0(Pr.900) to set the meter needle to point to full-scale.
Remarks
⋅
When outputting the item that cannot achieve a 100% value easily by operation, e.g. output current, set "21" (reference
voltage output) in Pr. 54 and perform calibration. (20mADC is output at terminal CA.)
⋅
Even when calibration parameters are set as C8(Pr.930)
output at terminal CA.
Initial Value


0%
0%
100%
100%
(ammeter)
(+) (-)
Output signal value
for minimum analog output
(C10(Pr.931))
Analog current output
value for maximum
output signal
(C11(Pr.931))
Output signal value
Monitor display and monitor output signal
Setting Range
Calibrate the scale of the meter

connected to terminal CA.
Calibrate the scale of the analog

meter connected to terminal AM.
Output signal value for minimum
0 to 100%
analog current output
Output current value for minimum
0 to 100%
analog current output
Output signal value for maximum
0 to 100%
analog current output
Output current value for maximum
0 to 100%
analog current output
⋅
Terminal CA is factory-set to provide a 20mADC
output in the full-scale status of the corresponding
monitor item. Calibration parameter C0 (Pr. 900)
allows the output current ratios (gains) to be
adjusted according to the meter scale. Note that
the maximum output current is 20mADC.
⋅
Use calibration parameters C8(Pr. 930) and C9(Pr.
930) to set a value for zero analog current output
(meter points zero) . In addition, use calibration
parameters C10(Pr. 931) and C11(Pr. 931) to set a
value for maximum analog current output.
⋅
Use calibration parameters C8(Pr. 930) and
C10(Pr.931) to set output signal values (monitor
output set in Pr. 54) when the current output at
terminal CA is zero or maximum. At this time, the
full-scale of each monitor is 100%. (Refer to page
105)
⋅
Use calibration parameters C9(Pr. 930) and
C11(Pr.931) to set the current output values at
terminal CA when the output signal value (monitor
output set in Pr. 54) is zero or maximum. At this
time, the current output calibrated using calibration
parameter C0(Pr.900) is 100%.
≥
C10(Pr.931) and C9(Pr.930)
Description
≥
C11(Pr.931), current can be
111
C2(Pr.902)
page 135
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