Mitsubishi Electric MELSEC Q Series User Manual page 62

● When setting a smaller value than the above reference value (larger value for a negative value) as the accumulated pulse
amount at the gain value output, making the setting value too small at a time may cause the hunting of a servomotor.
To make the accumulated pulse amount value smaller, check the machine operation and adjust the value.
● To change "Accumulated pulse setting" after the gain adjustment execution where the accumulated pulse amount at the
gain value output has been changed from the default value, execute the gain adjustment again.
Gain adjustment can be performed in the following two methods.
• Adjusting with the default accumulated pulse amount
• Adjusting with specified accumulated pulse amount
(a) Adjusting gain with the default accumulated pulse amount
Follow the procedure below.
1 Change the operation mode to the zero/gain adjustment mode.
2 Set "Accumulated pulse setting" in the switch setting according to the necessary accumulated pulse amount.
3 Adjust the voltage to be the necessary voltage value between the check pins.
(b) Adjusting gain with specified accumulated pulse amount
Follow the procedure below.
1 Change the operation mode to the zero/gain adjustment mode.
Set "Accumulated pulse setting" in the switch setting according to the necessary accumulated pulse amount. (Do not
2
specify amount that exceeds the setting range.)
Write the accumulated pulse amount using a sequence program.
[When one of the selections 1 to 4 is specified in "Accumulated pulse setting"]
Set the specified accumulated pulse amount in "
3
[When one of the selections 5 to 8 is specified in "Accumulated pulse setting"]
Set the specified accumulated pulse amount in "
4 Adjust the voltage to be the necessary voltage value between the check pins.
(3) Zero/gain adjustment setting range
When performing zero/gain adjustment, satisfy the following two conditions.
• Setting range: -10 to 10V
• The difference between a gain value and zero value is as follows.
In case of positive accumulated pulse amount
In case of negative accumulated pulse amount
60
Accumulated pulse amount write command
Accumulated pulse amount write command
(Gain value) - (Zero value)  5.0V
(Gain value) - (Zero value)  -5.0V
Analog output adjustment area 1".
Cd.5
<Write the accumulated pulse amount as 10000.>
Analog output adjustment area 2".
Cd.9
<Write the accumulated pulse amount as 100000.>