Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual Page 295

Fr-a800 series.

NOTE
• During continuous operation, the position command speed drops to 0 in each point table operation before starting the next
point table operation.
• During continuous operation, no point table selection signal is received. Select the position feed length using point table before
turning ON the start command. Only the maximum frequency can be changed during operation.
 Example 2 of positioning operation using point table (Automatic loop
positioning operation using the point table selected at the start of the
operation)
The following figure shows a loop operation example using the point table 2 to point table 4 in the following point table. The
operation is started from the point table 2 (start point). Set "12" in the auxiliary function of the point table 4 (end point).
Point table
Target position
1
50000
2
70000
3
100000
4
60000
*1
The positioning operation is the loop. To stop the operation, turn OFF the STF (STR) signal, or turn ON the X87 (sudden stop) input signal.
Operation
1.
The operation is started from the point table 2 (start point).
2.
The operation is switched to the one using the point table 3.
3.
The operation is switched to the one using the point table 4 (end point).
4.
According to the setting in the auxiliary function for the point table 4 (Pr.1237 = "12"), the operation is switched to
the one using the point table 2 selected at the start (loops back to the start point from the end point).
5.
The loop of operations 1 to 4 executes.
Position command
speed
0
Position feed
length
0
Servo ON
(LX)
STF
RM
ON
 Example 3 of positioning operation using point table (variable speed
operation)
• The maximum frequency can be changed during positioning operation. Use as many point tables as the number of
maximum speeds to be set.
294
5. PARAMETERS
5.5 Position control under vector control and PM sensorless vector control
Maximum
speed
(Hz)
60
20
10
5
Point table
Point table
Point table
No.2
No.3
No.4
20Hz
10Hz
10Hz
5Hz
100ms
100ms
30000
60000
70000
100000
70000
ON
ON
Acceleration
Deceleration
time (s)
time (s)
1
1
2
2
4
4
3
3
Point table
Point table
No.2
No.3
20Hz
100ms
100ms
100ms
10Hz
70000
-130000
160000
230000
Dwell time
Auxiliary function
*1
(ms)
1 (absolute position,
100
continuous)
11 (incremental position,
100
continuous)
1 (absolute position,
100
continuous)
12 (incremental position,
100
continuous)
Point table
Point table
No.4
No.2
20Hz
5Hz
100ms
100ms
60000
70000
100000
160000
230000
Point table
No.3
Time
100ms
10Hz
-130000
100000