Outline Of Sub Functions - Mitsubishi Electric MELSEC-LD77MS2 User Manual

13.1 Outline of sub functions

13.1.1 Outline of sub functions
Sub function
Functions OPR retry function
characteristic
to machine
OPR
OP shift function
Backlash compensation
function
Functions that
compensate
Electronic gear function
control
Near pass function
Speed limit function
Torque limit function
Functions that
limit control
Software stroke limit
function
Hardware stroke limit
function
Forced stop function
Speed change function
Functions that
Override function
change control
details
Acceleration/deceleration
time change function
Torque change function
Target position change
function
1: The near pass function is featured as standard and is valid only for setting continuous path control for position control.
It cannot be set to be invalid with parameters.
"Sub functions" are functions that compensate, limit, add functions, etc., to the control
when the main functions are executed. These sub functions are executed by
parameter settings, operation from GX Works2, sub function sequence programs, etc.
The following table shows the types of sub functions available.
This function retries the 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 compensates the position by
the designated distance from the machine OP and sets that position as the
OP address.
This function compensates the mechanical backlash. Feed command
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.
When the movement amount per pulse is set, a flexible positioning system
that matches the machine system can be structured.
This function suppresses the machine vibration when the positioning data is
1
switched during continuous path control in the interpolation control.
If the command speed exceeds "
function limits the commanded speed to within the "
setting range.
If the torque generated by the servomotor exceeds "
" during control, this function limits the generated torque to within the
value
"
Pr.17
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 hardware stroke limit
switch.
This function stops all axes of the servo amplifier with the forced stop signal.
This function changes the speed during positioning.
Set the changed speed in the speed change buffer memory (
speed value
Speed change request
This function changes the speed within a percentage of 1 to 300% during
positioning. This is executed using "
This function changes the acceleration/deceleration time during speed
change. (Functions 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.
" setting range.
Torque limit setting value
), and change the speed with the speed change request (
).
13 - 2
Chapter 13 Control Sub Functions
Details
" during control, this
Speed limit value
Pr.8
Speed limit value
Pr.8
Torque limit setting
Pr.17
Positioning operation speed override
Cd.13
"
New
Cd.14
Cd.15
".