FX2N-10PG positioning Learning to Use the FX Family for Positioning Control
FX Positioning Control Systems 4 - 45
4.4.2 Important buffer memory locations
The FX
2N
-10PG contains 1,300 buffer memory (BFM) addresses, which are 16-bit (1 word) areas of
memory that contain information relevant to the control of positioning operations. Most of these
addresses are reserved for data to be used in table operations. The FX
2N(C)
or FX
3U(C)
PLC that is con-
nected to the FX
2N
-10PG can send and receive data to the buffer memory addresses to change and/
or update information. This exchange of information takes place through dedicated PLC instructions
known as the FROM/TO instructions. (For FX
3U(C)
PLCs, the MOV instruction can also be used to trans-
fer data to/from special function blocks.)
The following buffer memory addresses are used in the ladder program example below. For details on
other BFM addresses, refer to the FX
2N
-10PG User’s Manual (JY992D93401).
Using a multiplication factor of 10
3
changes the units from μm to mm.
BFM # Item Set value Note
#1, #0 Maximum speed 50,000 Hz
#2 Bias speed 0 Hz
#11 Acceleration time 100 ms
#12 Deceleration time 100 ms
#14, #13 Target address 1 50 mm
#16, #15 Operation speed 1 50,000 Hz
#25, #24 Current address D11, D10 mm
#26
Operation command — —
Bit 0 Error reset M0 X000
Bit 1 STOP M1 X001
Bit 2 Forward rotation limit M2 X002
Bit 3 Reverse rotation limit M3 X003
Bit 8 Relative/Absolute positioning M8 (Bit 8 =1) Relative positioning
Bit 9 START command M9 X007
#27
Operation pattern — —
b0 1-speed positioning operation — —
#28 Status information M20 – M31
#33, #32 Pulse rate 4,000 PLS/rev
#35, #34 Feed rate 1,000 μm/rev
#36
Parameters — —
Bit 1,
Bit 0
System of units Bit 1: 1, Bit 0: 0 Combined system
Bit 5,
Bit 4
Multiplication factor
Bit 5: 1, Bit 4: 1
10
3
#37 Error code D20 —
Tab. 4-30:
Buffer memory addresses of FX
2N
-10PG
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