Mitsubishi Electric MELSEC Q Series User Manual page 63

Positioning module
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(4) Setting method
The following are the procedures for zero adjustment and gain adjustment.
(a) When using the switches on the front of the QD73A1
Start
Set the servomotor in the servo-lock status.
Turn on both DIP switch 1 and 2 on the lower part of
the module, then turn on the power.
Check that the module is in the zero/gain adjustment
mode on the RUN LED.
(The LED flashes in the zero/gain adjustment mode.)
Configure "Accumulated pulse setting" in the switch
setting, and write it to the CPU module.
Turn off then on the power, or reset the CPU module.
1
Zero adjustment
Specify zero adjustment by changing the SELECT/SET
switch to SELECT, while checking the ZERO LED.
(Zero/gain adjustment switches every time when the
switch is set to SELECT.)
Zero adjustment
ZERO
ON
GAIN
Adjust the voltage to be 0V between check pins using
the UP/DOWN switch. (Holding the switch increases
the adjustment amount.)
Set the SELECT/SET switch to the SET side and check
that the BUSY LED turns on. After the BUSY LED
turned off, set the SELECT/SET switch back to the
*2
center.
*1
The operation mode cannot be switched to the zero/gain adjustment mode if the power is turned on ahead of turning on
DIP switch 1 and 2.
*2
The zero adjustment value and gain adjustment value are recorded in the flash ROM inside the QD73A1 by setting the
SELECT/SET switch on the SET side, and they are not erased even at a power-off.
*3
If an error occurs in the zero/gain adjustment mode, the ERR. LED turns on. If the ERR. LED is on, turn on Error reset
signal (Y28) then perform zero/gain adjustment again.
CHAPTER 4 SETTINGS AND PROCEDURE BEFORE OPERATION
Gain adjustment
*1
Specify gain adjustment by changing the SELECT/SET
switch to SELECT, while checking the GAIN LED.
(Zero/gain adjustment switches every time when the
switch is set to SELECT.)
Adjust the voltage to be the gain value between check
pins using the UP/DOWN switch. (Holding the switch
increases the adjustment amount.)
Set the SELECT/SET switch to the SET side and check
that the BUSY LED turns on. After the BUSY LED
turned off, set the SELECT/SET switch back to the
center.
Turn off the power, then turn off both DIP switch 1 and
2 on the lower part of the module.
*3
Is the ERR.LED off?
YES
ZERO
Gain adjustment
GAIN
ON
*2
*3
Is the ERR.LED off?
YES
End
NO
4
NO
1
61

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