Yaskawa MP920 Motion Module - Manual (Page 61)

2.3 Position Control
2-35
2
With the SVA-02A Module (2-axis Servo Module), there are position buffers for only 2 axes.
Using the Position Buffers
By first storing in the position buffers the position information for a machine whose operat-
ing pattern has been determined in advance, continuous positioning of up to 256 points is
enabled simply by refreshing the buffer pointer at the completion of a single-block opera-
tion.
Writing to Position Buffers
1. Set the Position Buffer Access Number (OL††38). Any number between 1 and 256
can be set.
2. Set the Position Buffer Write Data (OL††3A).
3. Set Position Buffer Write (OB††21E) in the Motion Command Control Flags to ON.
1
2
3
256
1
2
3
256
1
2
3
256
1
2
3
256
OW 01 RUN Command Settings
Position Reference Setting
Position Buffer Access Number
Position Buffer Write Data
Position Buffer Read Data
Motion Control Flags
OL 12
OW 21
OL 38
OL 3A
IL 28
CPU Module SVA Module
Axis 1 position buffers
Axis 2
Axis 3
Axis 4
INFO
CPU Module
96
123456
OW 21
OL 38
OL 3A
1
2
3
256
1
2
3
256
1
2
3
256
1
2
3
256
96 123456
SVA Module
Axis 2
Axis 3
Axis 4
Axis 1 position buffers