9 Positioning Control
9.9 Linear Interpolation Operation
175
FX3U-20SSC-H Positioning Block User's Manual
1
Introduction
2
System
configuration
3
Example
Connection
4
Installation
5
Wiring
6
Memory
configuration
and data
7
Before starting
positioning
control
8
Manual control
9
Positioning
Control
10
Table Operation
*1. Shaded columns are invalid for interpolation operation.
*2. In interpolation operation, the system performs trapezoidal acceleration/deceleration even if
approximate S-shaped acceleration/deceleration is selected.
*3. For cautions on setting the pulse rate and feed rate in interpolation operation, refer to the following.
→ Refer to Subsection 7.11.3
POINT
• When using linear interpolation operation, the operation pattern selection should set in both axes as linear
interpolation.
If the same operation pattern is not set in both axes, the following operation is executed.
1) When linear interpolation is set to the operation pattern of the X-axis and a different operation pattern
is set to the Y-axis
The operation pattern of the Y-axis is disregarded, and linear interpolation operation is executed.
2) When an operation pattern different than linear interpolation is set to the operation pattern of the X-axis
and linear interpolation is set to the Y-axis
X-axis: Operates by the operation pattern set in the X-axis.
Y-axis: Does not operate.
• The positioning completion signal turns ON if the travel distance is 0.
If the travel distance is 0 or the travel time is too short, however, it is impossible for the sequence program
to detect the positioning completion signal turning OFF.
*4
*4. Turning OFF of the positioning completion signal can be detected when the positioning completion
signal output waiting time is set if the version is Ver. 1.20 or later.
→ For details on the Positioning completion signal output waiting time, refer to Subsection 7.9.11
• When interpolation operations are consecutively repeated in a table operation, the 20SSC-H provides
continuous pass operation.
→ For details on the continuous pass operation, refer to Section 10.10
• Pulse rate and feed rate
In versions earlier than Ver. 1.20, make sure that the ratio between the pulse rate and the feed rate is
equivalent between the X-axis and the Y-axis.
In versions Ver. 1.20 or later, if the ratio between the pulse rate and the feed rate is not equivalent between
the X-axis and the Y-axis, set "interpolation gear ratio selection" to "X/Y-axis."
→ For selection of the interpolation gear ratio, refer to Subsection 7.11.3
BFM Number
Data type
X-axis Y-axis
Operation speed present value BFM #11,#10
BFM #111,#110
*1
Monitor data
System of units (user unit) Operation parameter 1 BFM #14000 b1,b0 BFM #14200 b1,b0 Positioning parameters
Unit of measurement for the
user units
Operation parameter 1 BFM #14000 b3,b2 BFM #14200 b3,b2 Positioning parameters
Position data magnification Operation parameter 1 BFM #14000 b5,b4 BFM #14200 b5,b4 Positioning parameters
Acceleration/deceleration
mode
*2
Operation parameter 1 BFM #14000 b11 BFM #14200 b11 Positioning parameters
STOP mode Operation parameter 1 BFM #14000 b15 BFM #14200 b15 Positioning parameters
Servo end check enabled/
disabled
Operation parameter 2 BFM #14002 b0 BFM #14202 b0 Positioning parameters
Servo ready check enabled/
disabled
Operation parameter 2 BFM #14002 b1 BFM #14202 b1 Positioning parameters
Interpolation gear ratio
selection
*3
(Ver.1.20 or later)
Operation parameter 2 BFM #14002 b14 Positioning parameters
Pulse rate
*3
BFM #14005,#14004 BFM #14205,#14204 Positioning parameters
Feed rate
*3
BFM #14007,#14006 BFM #14207,#14206 Positioning parameters
Maximum speed BFM #14009,#14008 BFM #14209,#14208 Positioning parameters
Interpolation time constant BFM #14022 BFM #14222 Positioning parameters
Servo end evaluation time BFM #14032 BFM #14232 Positioning parameters
Positioning completion signal output waiting time (Ver.1.20
or later)
BFM #14106 BFM #14306 Positioning parameters
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