YASKAWA E-V-MD Series User Manual page 146

The following example outlines how the maximum limit for position deviation is calculated. These conditions
apply.
• Maximum speed = 6000
• Encoder resolution = 131072 (17 bits)
• PnAC6 = 400
PnA44 1
• =
PnA42
1
Under these conditions, the following equation is used to calculate the maximum limit (Pn520).
6000 131072
Pn520 = ×
60 400/10
= 327680 × 2
655360
=
If the acceleration/deceleration of the position reference exceeds the capacity of the servomotor, the servomo-
tor cannot perform at the requested speed, and the allowable level for position error will be increased as not to
satisfy these equations. If so, lower the level of the acceleration/deceleration for the position reference so that
the servomotor can perform at the requested speed or increase the excessive position error alarm level
(Pn520).
 Related Parameter
Excessive Position Error Alarm Level
Pn520
Setting Range
1 to 1073741823
 Related Alarm
Alarm
Alarm Name
Display
A.d00
Position Error Overflow
(3) Vibration Detection Function
Set the vibration detection function to an appropriate value with the vibration detection level initialization. For
details on how to set the vibration detection function, refer to 9.10 Vibration Detection Level Initialization.
8.1 Type of Adjustments and Basic Adjustment Procedure
1
× × 2
1
Setting Unit Factory Setting
1 reference unit
Position errors exceeded parameter Pn520.
Position
When Enabled
5242880 Immediately
Meaning
Classifica-
tion
Setup
8
8-13