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3 FUNCTION LIST
3.1 Control Functions
Sub functions
When the main functions are executed, this function compensates and limits controls, or adds functions.
The outline of the functions that assist positioning control using the Simple Motion module is described below.
Sub function
Details
Functions
characteristic to
machine home
position return
Home position return retry
function [RD77MS]
This function retries the home position return with the upper/lower limit switches during the machine home
position return. This allows machine home position return to be carried out even if the axis is not returned
to before the proximity dog with JOG operation, etc.
Home position shift function
[RD77MS]
After returning to the machine home position, this function compensates the position by the designated
distance from the machine home position and sets that position as the home position address.
Functions that
compensate
control
Backlash compensation
function
This function compensates the mechanical backlash amount. Feed commands equivalent to the set
backlash amount are output each time the movement direction changes.
Electronic gear function
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.
Near pass function
This function suppresses the machine vibration when the speed is changed during continuous path control
in the interpolation control.
Functions that
limit control
Speed limit function
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.
Torque limit function
If the torque generated by the servomotor exceeds "[Pr.17] Torque limit setting value" during control, this
function limits the generated torque to within the "[Pr.17] Torque limit setting value" setting range.
Software stroke limit function
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.
Hardware stroke limit function
This function carries out deceleration stop with the hardware stroke limit switch.
Forced stop function
This function stops all axes of the servo amplifier with the forced stop signal.
Functions that
change control
details
Speed change function
This function changes the speed during positioning.
Set the new speed in the speed change buffer memory ([Cd.14] New speed value), and change the speed
with the speed change request ([Cd.15]).
Override function
This function changes the speed within a percentage of 0 to 300% during positioning. This is executed
using "[Cd.13] Positioning operation speed override".
Acceleration/deceleration
time change function
This function changes the acceleration/deceleration time during speed change.
Torque change function
This function changes the "torque limit value" during control.
Target position change
function
This function changes the target position during positioning.
Position and speed can be changed simultaneously.
Functions
related to
positioning start
Pre-reading start function
This function shortens the virtual start time.
Absolute position system
This function restores the absolute position of designated axis.
Functions
related to
positioning stop
Stop command processing for
deceleration stop function
Function that selects a deceleration curve when a stop cause occurs during deceleration stop processing
to speed 0.
Continuous operation
interrupt function
This function interrupts continuous operation. When this request is accepted, the operation stops when the
execution of the current positioning data is completed.
Step function
This function temporarily stops the operation to confirm the positioning operation during debugging, etc.
The operation can be stopped at each "automatic deceleration" or "positioning data".
Содержание MELSEC iQ-RD77GF16
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