Calibration Procedure; Calibration Of Voltmeter - Mitsubishi Electric FR-A7AD Instruction Manual

HIGH-SPEED ANALOG OUTPUT

4.3 Calibration procedure

4.3.1

Calibration of voltmeter

If a voltmeter is deviated, it can be calibrated at 0V or full-scale voltage (10V) output of the terminals DA2
to DA5.
(1) Calibration at 0V output
In the initial status, 0V calibration is performed
at power OFF → ON and at inverter reset.
To perform 0V calibration after the power has
been turned ON, turn ON the X83 signal. To
use the X83 signal, assign the 0V calibration
request signal (X83) to an input terminal
beforehand. While the 0V calibration is
performed, the during 0V calibration signal
(Y83) is ON.
* To input the X83 signal, set "83" in one of Pr.178 to Pr.189 (input terminal function selection) to assign the function to a
terminal.
To output the Y83 signal, set "83 (positive logic)" or "183 (negative logic)" in one of Pr.190 to Pr.196 or Pr.533 to Pr.536
(output terminal function selection) to assign the function to a terminal. To output the LF signal, set "98 (positive logic) or
198 (negative logic)" to assign the function.
REMARKS
• The alarm signal (LF) turns ON if 0V calibration fails.
• Output signals are undetermined while the Y83 signal is ON. The Y83 signal does not turn ON while the power is
ON or during inverter reset.
14
Turning ON the X83 turns ON the Y83.
ON
X83
ON
Y83
High-speed
analog output
At least 20ms required
Hold for at least 100ms
During calibration,
the high-speed analog output is 0.