YASKAWA SVC - 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
6-38
 Operation
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.
The restrictions on OL  42 and OL  46 depend on the setting of fixed parameter No. 4
(Reference Unit Selection) as given below.
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.
Electronic Gear Ratio Negative Direction Positive Direction
16:1 (equivalent to 20 bits) -1,023.99 rotations 1,023.99 rotations
1:1 (24 bits) -63.99 rotations 63.99 rotations
Setting of Fixed
Parameter No. 4
0 1 2 3 4
Reference Unit pulse mm deg inch μm
Maximum Value of
OL42 and
OL46
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.
Time
Speed
Reference speed
[min
-1
]
Distance required to decelerate to a stop
(servo reference units)
Deceleration time [s]
The deceleration time
will be longer if the
reference speed is
reduced.
×2,147,483,647
No. 6 (Travel Distance per Machine Rotation)
×
No. 9 (Machine Gear Ratio Term)
No. 36 (Number of Pulses per Motor Rotation)
×
No. 8 (Servo Motor Gear Ratio Term)
Important