Mitsubishi A1SD75P1-S3, 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.
Feed pulses 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
Functions that
compensate
control
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
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 *
1
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
Functions that
limit control
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
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
*
1
To carry out "torque limit", the "D/A conversion module" and a "drive unit capable of the torque limit command with an
analog voltage" must be prepared.
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