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CHAPTER 4 SETTINGS AND PROCEDURE BEFORE OPERATION
4
4.5 Zero/gain Adjustment
(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
*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.
ZERO
GAIN
ZERO
GAIN
Start
End
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.
*1
Check that the module is in the zero/gain adjustment
mode on the RUN LED.
(The LED flashes in the zero/gain adjustment mode.)
Adjust the voltage to be the gain value between check
pins using the UP/DOWN switch. (Holding the switch
increases the adjustment amount.)
Turn off then on the power, or reset the CPU module.
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.)
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 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
center.
*2
Configure "Accumulated pulse setting" in the switch
setting, and write it to the CPU module.
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.
*2
Turn off the power, then turn off both DIP switch 1 and
2 on the lower part of the module.
Is the ERR.LED off?
*3
YES
Is the ERR.LED off?
*3
YES
NO
NO
Zero adjustment
1
1
Zero adjustment
ON
Gain adjustment
Gain adjustment
ON