9 Positioning Control
9.10 Linear Interpolation Operation (Interrupt Stop)
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FX3U-20SSC-H Positioning Block User's Manual 
*1. Shaded columns are invalid for interpolation operation.
*2. The error in the calculation of user units is included in the value of the current address when an
interrupt occurs.
*3. In interpolation operation, the system performs trapezoidal acceleration/deceleration even if
approximate S-shaped acceleration/deceleration is selected.
*4. For cautions on setting the pulse rate and feed rate in interpolation operation, refer to the following.
→ Refer to Subsection 7.11.3
BFM Number
Data type
X-axis Y-axis
Standby for remaining travel
distance at stop
Status information BFM #28 b7 BFM #128 b7 Monitor data
Received target address (Ver.1.20 or later) BFM #25,#24 BFM #125,#124 Monitor data
Received target speed (Ver.1.20 or later) BFM #27,#26
BFM #127,#126
*1
Monitor data
Current address (user) BFM #1,#0 BFM #101,#100 Monitor data
Current address (pulse) BFM #3,#2 BFM #103,#102 Monitor data
Real current address (user) (Ver.1.20 or later) BFM #21,#20 BFM #121,#120 Monitor data
Real current address (pulse) (Ver.1.20 or later) BFM #23,#22 BFM #123,#122 Monitor data
Operation speed present value BFM #11,#10
BFM #111,#110
*1
Monitor data
Current address when an interrupt occurs (INT0) 
(Ver.1.30 or later)
*2
BFM #35,#34 BFM #135,#134 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
*3
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
*4
 (Ver.1.20 or later)
Operation parameter 2 BFM #14002 b14 Positioning parameters
Pulse rate
*4
BFM #14005,#14004 BFM #14205,#14204 Positioning parameters
Feed rate
*4
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