Mitsubishi Electric FR-A820-00046 Instruction Manual page 348

Position control under vector control and PM sensorless vector control
Roll feed mode (Pr. 1293)
● If the roll feed mode is enabled in an application that needs repeated positioning in the same
direction, such as a conveyor, positioning can be performed repeatedly without position com-
mand overflow.
● When the roll feed mode is enabled (Pr. 1293="1"), the position where the first position command
is created is set as the home position and the droop pulses are cleared.
When Pr. 1293="1", simple positioning is available even if home position return cannot be
completed.
● Positioning modes with which the roll feed mode can be enabled:
– Point table mode
– Home position return mode
– JOG mode
● Basic operation example
command speed
selection signal
Servo-ON (LX)
Start signal (STF)
Fig. 5-65:
Input/output signals for point table positioning
Input/
output
Input
Output
Tab. 5-60:
5 - 168
Position
0
Point table
Basic operation of roll feed mode
Signal name
X76 Proximity dog
X87 Sudden stop
MEND Travel completed
Home position
ZA
return failure
During position
PBSY command
operation
Home position
ZP
return completed
Input/output signals for point table positioning
1000 0
Function
ON: dog ON
OFF: dog OFF
When turned ON, the motor
decelerates and stops according to
Pr. 464.
Turns ON when the position
command operation has completed
while the number of droop pulses is
within the positioning completion
width.
Turns ON while the home position
return warning occurs.
Turns ON during position command
operation.
Turns ON after home position return
operation is complete.
Parameters
Indication of
position command
1000
or current position
I002827E
Pr. 190 to Pr. 196
Pr. 178 to
setting
Pr. 189
Positive Negative
setting
logic logic
⎯
76
⎯
87
⎯
38 138
⎯
56 156
⎯
61 161
⎯
63 163