Mitsubishi A1SD75M1, User Manual

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MELSEC-A
3 SPECIFICATIONS AND FUNCTIONS
3.3.3 AD75 auxiliary functions and common functions
Auxiliary functions
The functions that assist positioning control using the AD75 are described below.
(Refer to "SECTION 2" for details on each function.)
Auxiliary function Details
Reference
section
Zero point return retry
function
This function retries the machine zero point return with the
upper/lower limit switches during machine zero point return. This
allows machine zero point return to be carried out even if the axis is
not returned to before the near-point dog with JOG operation, etc.
12.2.1
Functions
characteristic
to machine
zero point
return
Zero point shift function
After returning to the machine zero point, this function
compensates the position by the designated distance from the
machine zero point position and sets that position as the zero point
address.
12.2.2
Backlash compensation
function
This function compensates the mechanical backlash.
Position/speed commands equivalent to the set backlash amount
are output each time the movement direction changes.
12.3.1
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.
12.3.2
Near pass mode function
This function suppresses the machine vibration when the speed
changes during continuous path control in the interpolation control.
12.3.3
Functions that
compensate
control
Follow up processing
function
This function monitors the motor rotation amount (real current
value) of the motor in a servo OFF status and reflects it on the
current feed value.
12.3.4
Speed limit function
If the command speed exceeds " Pr.7 Speed limit value" during
control, this function limits the commanded speed to within the
" Pr.7 Speed limit value" setting range.
12.4.1
Torque limit function
If the torque generated by the servomotor exceeds " Pr.18
Torque limit setting value" during control, this function limits the
generated torque to within the " Pr.18 Torque limit setting value"
setting range.
12.4.2
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.
12.4.3
Hardware stroke limit
function This function carries out deceleration stop with the limit switch
connected to the AD75 external device connection connector.
12.4.4
Functions that
limit control
Servo ON/OFF function
This function performs all axes servo ON/OFF using the all axes
servo ON signal (Y15).
This function performs the servo ON/OFF of each axis using
"
Cd.100
Servo OFF command".
12.4.5
Speed change function
This function changes the speed during positioning.
Set the new speed in the speed change buffer memory ( Cd.16
New speed value), and change the speed with the Speed change
request ( Cd.17 ).
12.5.1
Override function
This function changes the speed within a percentage of 1 to 300%
during positioning. This is executed using " Cd.18 Positioning
operation speed override".
12.5.2
Acceleration/deceleration
time change function This function changes the acceleration/deceleration time during
speed change.
12.5.3
Functions that
change control
details
Torque change function This function changes the "torque limit value" during control. 12.5.4
Absolute position restoration function *
1
This function restores the absolute position of the axis at servo
power-on.
12.6
*
1
The "servomotor with absolute position detector that can configure an absolute position detection system" is required.