Outline Of Sub Functions - Mitsubishi Electric MELSEC-L LD75P User Manual

12.1.1

Outline of sub functions

The following table shows the types of sub functions available.
Sub function
OPR retry function
Sub functions
specifically for
machine OPR
OP shift function
Backlash compensation function
Electronic gear function
Functions for
compensating
the control
Near pass function
Output timing selection of near pass
control
Speed limit function
Torque limit function
Functions to limit
the control
Software stroke limit function
Hardware stroke limit function
Speed change function
Override function
Functions to
change the
Acceleration/deceleration time change
control details
function
Torque change function
Target position change function
Absolute position restoration function
508
This function retries the machine OPR with the upper/lower limit switches during machine OPR.
This allows machine OPR to be carried out even if the axis is not returned to before the near-
point dog with JOG operation, etc.
After returning to the machine OP, this function offsets the position by the designated distance
from the machine OP position and sets that position as the OP address.
This function compensates the mechanical backlash. Feed pulses equivalent to the set backlash
amount are output each time the movement direction changes.
By setting the movement amount per pulse, this function can freely change the machine
movement amount per commanded pulse.
A flexible positioning system that matches the machine system can be structured with this
function.
This function suppresses the machine vibration when the positioning data is switched during
*1
continuous path control in the interpolation control.
This function allows the user to select the timing to output the difference (l) between the actual
and the set positioning end addresses in continuous path control, in which the difference (l) is
output during the execution of the next positioning data.
If the command speed exceeds "[Pr.8] Speed limit value" during control, this function limits the
commanded speed to within the "[Pr.8] Speed limit value" setting range.
If the torque generated by the servomotor exceeds "[Pr.17] Torque limit setting value" during
*2
control, this function limits the generated torque to within the "[Pr.17] Torque limit setting value"
setting range.
If a command outside of the upper/lower limit stroke limit setting range, set in the parameters, is
issued, this function will not execute positioning for that command.
This function carries out deceleration stop with the limit switch connected to the LD75 external
device connector.
This function changes the speed during positioning.
Set the changed speed in the speed change buffer memory ([Cd.14] New speed value), and
change the speed with the speed change request ([Cd.15] Speed change request).
This function changes the speed within a percentage of 1 to 300% during positioning. This is
executed using "[Cd.13] Positioning operation speed override".
This function changes the acceleration/deceleration time during speed change. (function added
to the speed change function and override function)
This function changes the "torque limit value" during control.
This function changes the target position during the execution of positioning. At the same time,
this also can change the speed.
This function restores the absolute position of designated axis. By this function, the OPR after
*3
power ON from OFF is not required once the OPR is executed when the system operation is
started.
Details