Mitsubishi Electric FR-A700 Instruction Manual page 568

Frequency/torque setting by analog input (terminals 1, 2 and 4)
Frequency setting signal (current) bias/gain adjustment method
1.Method to adjust any point by application of voltage (current) to across the terminals 2-5 (4-5).
The following example illustrating the procedure assumes that Pr. 241 is set to "0":
Confirmation of the RUN indication and
operation mode indication.
The inverter must be at a stop.
The inverter must be in the PU operation mode
(using the PU/EXT key).
Press the MODE key to choose the parameter
setting mode.
Turn the digital dial until "C..." appears.
Press the SET key to display "C---".
Turn the digital dial until "C 4 (C 7)" appears.
Set to C4 "Terminal 2 frequency setting gain".
Press the SET key to display the analog voltage
(current) value (%).
Apply the maximum set value. (Turn the external
potentiometer to its maximum)
CAUTION:
After performing the operation in step
not touch the digital dial until completion of
calibration.
Press the SET key to set.
By turning the digital dial, you can read another parameter.
Press the SET key to return to the "C---" indication (step
Press the SET key twice to show the next parameter (Pr.CL).
Fig. 6-188: Bias and gain adjustment by application of an reference signal
NOTES
If the frequency meter (indicator) connected to across terminals CA-PC does not indicate
just 50Hz, set calibration parameter C0 "CA terminal calibration". (Refer to section 6.15.4)
Error code Er3 may be displayed when you save if the frequency values for gain and bias
are less than approx. 5% apart. If this happens correct the frequency settings and save
again.
If you try to set Pr. 125/126, C2 to C7 and C12 to C15 in external mode (EXT LED is on) error
code Er4 will be displayed when you save. If this happens switch to PU mode and repeat the
setting procedure, then save your settings.
If you try to set Pr. 125/126, C2 to C7 and C12 to C15 while the motor is being operated by
the inverter error code Er2 will be displayed. If this happens stop the inverter, repeat the set-
ting procedure and save your settings.
6 - 388
Operation
do
Display
The parameter number
read previously appears.
C0 to C41 setting is
enabled.
Terminal 2 input Terminal 4 input
Analog voltage (current) value (%)
across terminals 2-5 (across
terminals 4-5)
The value is nearly 100 (%) in
the maximum position of the
potentiometer.
The value is nearly 100 (%)
in the maximum position of
the potentiometer. Terminal 2 input
Flicker ... Parameter setting complete!
(Adjustment completed)
).
Parameter
Terminal 4 input
I001612E