YASKAWA SVC - Page 88

3.4 Motion Parameter Details
3.4.1 Fixed Parameter Details
3-35
3
Parameters for Motion Control
 Maximum Number of Absolute Encoder Rotations
Set the maximum number of rotations that the absolute encoder can manage. This parameter
is used to manage position information when an absolute encoder is used for an infinite-length
axis.
Setting Precautions
• Set this parameter to match the settings for the encoder.
• Set this parameter to match the value set for the Multiturn Limit SERVOPACK parameter.
 Feedback Speed Movement Averaging Time Constant
Set the moving average time constant for the feedback speed. The IL40 monitor param-
eter (Feedback Speed) contains the value that is determined by the time constant in this
parameter and the unit-converted difference between feedback positions for each high-speed
scan.
 User-specified SERVOPACK Parameter Number
Specify the SERVOPACK parameter number (the  in Pn) that is to be applied auto-
matically.
The value set for the OL70 setting parameter (User-specified SERVOPACK Parameter
Set Value) is automatically written to the SERVOPACK parameter that is set in this parameter.
Setting Precautions
This parameter is valid when bit B (User-specified SERVOPACK Parameter Auto-Write) in fixed
parameter No. 1 is set to 1 (Enabled).
 User-specified SERVOPACK Parameter Size
Set the data size of the SERVOPACK parameter that is specified in fixed parameter No. 44
(User-specified SERVOPACK Parameter Number).
No. Name Setting Range Setting Unit Default
38
Maximum Number of Absolute
Encoder Rotations
0 to 2
31
−1
Revolutions 65,534
For infinite-length axes (i.e., when bit 0 in fixed parameter No. 1 is set to 1), set this parame-
ter to any value less than or equal to 65,534 (the same value as Pn205).
Fixed Parameter No. 38 and
SERVOPACK Parameter Pn205 = 65,535
Fixed Parameter No. 38 and
SERVOPACK Parameter Pn205 ≠ 65,535
No. Name Setting Range Setting Unit Default
42
Feedback Speed Movement
Averaging Time Constant
0 to 32 ms 10
No. Name Setting Range Setting Unit Default
44
User-specified SERVOPACK
Parameter Number
0 to 65,535 0 0
No. Name Setting Range Setting Unit Default
45
User-specified SERVOPACK
Parameter Size
1 or 2 word 1
SVC
Example
0
+32767
-32768
Multi-turn
Data
Forward
Reverse
Number of
revolutions
0
Multi-turn
Data
Value of Pn205
Forward
Reverse
Number of
revolutions
SVC
SVR
SVC
SVC