Zero/Gain Adjustment - Mitsubishi Electric MELSEC Q Series User Manual

4.5

Zero/gain Adjustment

Zero/gain adjustment is a process to adjust analog output voltage according to accumulated pulse amount.
Adjust the analog output voltage value according to the analog speed command input of the drive unit used.
Adjust analog output voltage using the check pins on the front of the QD73A1.
For the position of check pins, refer to the following.
Page 56, Section 4.3
(1) Zero adjustment
Adjust the analog output voltage of when accumulated pulse amount is "0". The voltage is adjusted to 0V as the
factory default. Zero adjustment may vary when the module is connected to a servomotor. In that case, perform
zero adjustment again. If the module is used with its zero adjustment being off, the connected servomotor rotates
a little when the power is turned on.
(2) Gain adjustment
Adjust the analog output voltage of when accumulated pulse amount is the maximum. In the factory default
setting, adjustment is made so that the analog output voltage becomes 10V when accumulated pulse amount is
the default value.
Adjust a gain value according to the rated speed command voltage of the drive unit used. The gain value can be
adjusted within the range of 5 to 10V.
When changing the accumulated pulse amount at the gain value output from the default value, set the
accumulated pulse amount by referring to the following reference values.
Accumulated
pulse setting
Setting range
Initial setting
[Selection 1] -3700 to 3700
[Selection 2] -7400 to 7400
[Selection 3] -11100 to 11100
[Selection 4] -14800 to 14800
[Selection 5] -37000 to 37000
[Selection 6] -74000 to 74000
[Selection 7] -111000 to 111000
[Selection 8] -148000 to 148000
CHAPTER 4 SETTINGS AND PROCEDURE BEFORE OPERATION
Accumulated pulse amount (unit: pulse)
Reference value for the setting
Default
When the gain value
value
is 5V
The initial setting is same as the case where [Selection 4] is set.
-2500 to -2000
3480
2000 to 2500
-5000 to -4000
6960
4000 to 5000
-7500 to -6000
10440
6000 to 7500
-10000 to -8000
13920
8000 to 10000
-25000 to -20000
34800
20000 to 25000
-50000 to -40000
69600
40000 to 50000
-75000 to -60000
104400
60000 to 75000
-100000 to -80000
139200
80000 to 100000
Excessive
When the gain value
(unit: pulse)
is 10V
-3700 to -3250 -3701 or less
3250 to 3700 3701 or more
-7400 to -6500 -7401 or less
6500 to 7400 7401 or more
-11100 to -9750 -11101 or less
9750 to 11100 11101 or more
-14800 to -13000 -14801 or less
13000 to 14800 14801 or more
-37000 to -32500 -37001 or less
32500 to 37000 37001 or more
-74000 to -65000 -74001 or less
65000 to 74000 74001 or more
-111000 to -97500 -111001 or less
97500 to 111000 111001 or more
-148000 to -130000 -148001 or less
130000 to 148000 148001 or more
4
error
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