Mitsubishi Electronics QD75MH1 ユーザーズマニュアル
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MELSEC-Q
3 SPECIFICATIONS AND FUNCTIONS
3.2.3 QD75MH sub functions and common functions
Sub functions
The functions that assist positioning control using the QD75MH are described
below. (Refer to Section 2 for details on each function.
below. (Refer to Section 2 for details on each function.
Sub function
Details
Reference
section
OPR retry function
This function retries the machine OPR with the upper/lower
limit switches during 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.
limit switches during 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.
12.2.1
Functions
characteristic
to machine
OPR
characteristic
to machine
OPR
OP shift function
After returning to the machine OP, this function compensates
the position by the designated distance from the machine OP
position and sets that position as the OP address.
the position by the designated distance from the machine OP
position and sets that position as the OP address.
12.2.2
Backlash compensation
function
function
This function compensates the mechanical backlash. Feed
pulses equivalent to the set backlash amount are output each
time the movement direction changes.
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.
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
compensate
control
Near pass function 1
This function suppresses the machine vibration when the
speed changes during continuous path control in the
interpolation control.
speed changes during continuous path control in the
interpolation control.
12.3.3
Speed limit function
If the command speed exceeds "
Pr.8
Speed limit value"
during control, this function limits the commanded speed to
within the "
within the "
Pr.8
Speed limit value" setting range.
12.4.1
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 "
generated torque to within the "
Pr.17
Torque limit setting
value" setting range.
12.4.2
Software stroke limit
function
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.
setting range, set in the parameters, is issued, this function will
not execute positioning for that command.
12.4.3
Hardware stroke limit
function
function
This function carries out deceleration stop with the limit switch
connected to the QD75MH external device connector.
connected to the QD75MH external device connector.
12.4.4
Functions that
limit control
limit control
Forced stop function
This function is stopped the all axis of the servo amplifier when
the forced stop input signal of the QD75MH external connector
is turned ON.
the forced stop input signal of the QD75MH external connector
is turned ON.
12.4.5
Speed change function
This function changes the speed during positioning.
Set the new speed in the speed change buffer memory
(
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
).
12.5.1
Override function
This function changes the speed within a percentage of 1 to
300% during positioning. This is executed using "
300% during positioning. This is executed using "
Cd.13
Positioning operation speed override".
12.5.2
Acceleration/deceleration
time change function
time change function
This function changes the acceleration/deceleration time during
speed change.
speed change.
12.5.3
Functions that
change control
details
change control
details
Torque change function
This function changes the "torque limit value" during control.
12.5.4
Absolute position system
This function restores the absolute position.
12.6
1: The near pass function is featured as standard and is valid only for position control. It cannot be set to be invalid with parameters.