Mitsubishi Electric 800 Series Instruction Manual page 221

Position control under 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 command 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
Position command
speed
Point table selection
signal
Servo-ON (LX)
Start signal (STF)
Input/output signals for point table positioning
Input/
Signal name
output
X76 Proximity dog
Input
X87 Sudden stop
Travel
MEND
completed
Home position return
ZA
failure
Output
During position
PBSY
command operation
Home position return
ZP
completed
• Output signal operation during positioning with point tables
Speed
0
Point table selection signal
(RH)
LX
STF
Y36
MEND
PBSY
220
PARAMETERS
0
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.
Position command
Point table 1
1000 0
Function
Motor speed
Dwell time
Indication of position
command or
1000
current position
Pr.190 to Pr.196
Pr.178 to
setting
Pr.189
Positive
setting
logic
76 ―
87 ―
― 38
― 56
― 61
― 63
Point table 2
Time
Negative
logic
138
156
161
163