
B-65150E/04 2. SETTING α SERIES SERVO PARAMETERS
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Calculate the number of position pulses.
[Number of position pulses] Parameter No. 2024
Number of position pulses = the amount of movement per motor
revolution (mm)/detection unit of the
detector (mm)
= 16 mm/0.0001 = 160000
If the number of position pulses exceeds 32767 as shown above, set bit
0 of parameter No. 2000 to 1, and reduce the number of position pulses
(parameter No. 2024) and number of velocity pulses (parameter No.
2023) by a factor of 10. (16000 is set in parameter No. 2024.)
The number of position pulses, obtained with the above method, is
16000 which is greater than 13100. An overflow occurs in the internal
calculation of the servo software, resulting in an invalid parameter
setting alarm. To prevent this, divide the value in parameter No. 2024
by 2 so that the value does not exceed 13100, and modify the following
parameters accordingly:
Parameter No. Remarks
2000#0 1
2023 8192/10/2
2024 160000/10/2
2043 (Value to be set originally)/2
2044 (Value to be set originally)/2
2047 (Value to be set originally)*2
2053 (Value to be set originally)*2
2054 (Value to be set originally)/2
2056 (Value to be set originally)/2
2057 (Value to be set originally)/2
2059 (Value to be set originally)*2
2074
(Remainder of the value to be set originally/4096)/
2 + (quotient of the value to be set originally/4096)
× 4096
2076 (Value to be set originally)/2
2128 (Value to be set originally)/2
2129
(Quotient of the value to be set originally/256) × 2 ×
256 + (remainder of the value to be set
originally/256)
When the Series 90A0 is used, a position feedback pulse
overflow can be prevented by a simple method. For this
method, see Supplementary 1 of Subsec. 2.1.5, "Actions
for Invalid Servo Parameter Setting Alarms."