Important Buffer Memory Locations - Mitsubishi Electric Melsec FX Series Beginners Manual

Learning to Use the FX Family for Positioning Control
4.6.4

Important buffer memory locations

The FX
3U
Table data, Positioning parameter data, and Servo parameter data. With "read only" or "read/write"
access, buffer memory addresses use bit and word information to control positioning operations.
Similar to the FX
ing operations.
Monitor data
Used to monitor the
current position, sta-
tuses, etc.
The following buffer memory addresses are used in the ladder program example below. For details on
other BFM addresses, refer to the FX
BFM Area
Monitor data
Control data
Positioning
parameter data
Tab. 4-39: Buffer memory addresses of FX
4 - 66
-20SSC-H buffer memory includes five separate data areas for: Monitor data, Control data,
-10PG, a large percentage of the BFM is dedicated to the control of table position-
2N
Control data
Used to control
positioning opera-
tions.
BFM # Item
#1, #0 X-axis current address
#101, #100 Y-axis current address
#28 X-axis status information
#128 Y-axis status information
#501, #500 X-axis target address 1
#503, #502 X-axis operation speed 1
X-axis operation command 1
Bit 0
Bit 1
Bit 2
Bit 3
#518
Bit 4
Bit 5
Bit 6
Bit 8
Bit 9
Y-axis operation command 1
#618 Bit 0
Bit 6
X-axis operation command 2
#519
Bit 4
X-axis operation pattern selection
#520 Bit 0
Bit 10
#521 Table operation start number
#14013,
X-axis JOG speed
#14012
Table information Positioning parameters
Used to store prede- Used to store parameters
fined table data. such as the max. speed
and accel/decel times.
-20SSC-H User's Manual (JY997D21301).
3U
Error reset
STOP
Forward rotation limit
Reverse rotation limit
Forward rotation JOG(+)
Reverse rotation JOG(-)
Zero-return
Relative/Absolute positioning
START command
Error reset
Zero-return
Positioning parameter enable command
1-speed positioning
Table operation (simultaneous)
-20SSC-H
3U
FX3U-20SSC-H positioning
Servo parameters
Used to store parameters
relevant to the servo(s).
Set value Note
D1, D0 PLS
D101, D100 PLS
D10 —
D110 —
10,000,000 PLS
2,000,000 Hz (PLS/sec)
M0–M15 —
M0 X007
M1 X006
M2 X000
M3 X010
M4 X001
M5 X002
M6 X003
Relative
M8 (Bit 8 = 1)
positioning
M9 X004, X005
M100–M115 —
M100 X007
M106 X003
M20–M35 —
M24 X001, X002
— —
H1 X004
H400 X005
0 Table row #0
1,000,000 Hz (PLS/sec)
MITSUBISHI ELECTRIC