YASKAWA SVC User Manual page 435

6.8 Precautions When Using Σ-7-series SERVOPACKs
6.8.6 Operating Specifications When Using an MP3000 Controller That Supports the Σ-7-series SERVOPACKs
 Operation
Reference speed
3. Restrictions to OL42 (Zero Point Return Travel Distance) and OL46
(External Positioning Final Travel Distance)
The maximum travel distances that can be used for OL42 (Zero Point Return Travel Distance),
which is used for ZRET (Zero Point Return), and OL46 (External Positioning Final Travel Dis-
tance), which is used for EX_POSING (Latch Target Positioning) and EX_FEED (Jog Mode with Exter-
nal Positioning), are given in the following table.
Electronic Gear Ratio
16:1 (equivalent to 20 bits)
The restrictions on OL
(Reference Unit Selection) as given below.
Setting of Fixed
Parameter No. 4
Reference Unit
Maximum Value of
OL42 and
OL46
Important
4.
Restrictions When Writing Fixed Parameters
If you write any fixed parameters after turning ON the power supply, save the settings to flash
memory and then turn the power supply OFF and ON again.
6-38
Speed
-1
[min ]
The deceleration time
will be longer if the
reference speed is
reduced.
Negative Direction
-1,023.99 rotations
1:1 (24 bits) -63.99 rotations

42 and OL
0
pulse
2,147,483,64
7
If a value that exceeds the above maximum value is set, IL02 bit 1 (Setting Parameter
Error) will turn ON and operation will be performed with OL42 or OL46 set to 0.
Distance required to decelerate to a stop
(servo reference units)
Deceleration time [s]
Positive Direction
1,023.99 rotations
63.99 rotations

46 depend on the setting of fixed parameter No. 4
1 2
mm deg
No. 6 (Travel Distance per Machine Rotation)
×
2,147,483,647
No. 36 (Number of Pulses per Motor Rotation)
Time
3 4
inch μm
×
No. 9 (Machine Gear Ratio Term)
×
No. 8 (Servo Motor Gear Ratio Term)