Panasonic MINAS E-series - Manual (Page 125)

125
[Connections and Settings in Internal Velocity Control Mode]
Connections and
Settings in Internal
V
e
locity Control Mode
PrNo. Parameter Name Function/Content
The parameter enables you to set time from when the brake release signal (BRK-
OFF:CN X5 pin 11) turns off until the motor becomes de-energized (servo free),
when you turn on Servo-OFF while the motor is stopped.
Also see Timing Chart “Servo ON/OFF Operation When the Motor is Rotating” on
Page 34 of Preparation edition.
Unlike Pr6A, Pr6B sets time from when the motor is de-energized (servo free)
before the brake release signal (BRK-OFF:CN X5 pin 11) turns off (i.e., brake
retained), when Servo-OFF is activated while the motor is still rotating.
Also see timing chart “Servo ON/OFF Operation When the Motor is Stopped” on
Page 34 of Preparation edition.
If you install a regenerative resistor externally, set this parameter to any value
other than 0 or 3 and connect the regenerative resistor between P (pin 5) and B
(pin 3) of the connector CN X1.
6A
6B
6C
Mech. break action
set-up at motor
standstill
Mech. break action
set-up at motor in
motion
External
regenerative
discharge resister
selection
0 -
100
[0]
0 -
100
[0]
0 - 3
• In order to prevent subtle travel/drop
of the motor (work) due to the action
delay time (tb) of the brake, set as
follows:
Setting of Pr6A
≥ tb
• Pr6A is set in the unit of (setting) ×
2ms.
• Refer to Timing Chart of “Servo-ON/
OFF Operation When the Motor is
Stopped” on Page 34.
ON
SRV-ON
BRK-OFF
Actual brake
Motor energized
Release
OFF
Retained
Release
Energized
Retained
De-energized
Pr6A
tb
• The parameter is set to prevent
deterioration of the brake to be cause
by rotation of the motor.
• In servo-off operation while the motor
is still running, time TB shown in the
right figure is time set by Pr6B or time
before rotation speed of the motor falls
below about 30r/min, whichever is
shorter.
• Pr6B is displayed in terms of (setting)
x 2ms.
• Refer to the timing chart of “Servo ON/
OFF Operation When the Motor is
Rotating” on Page 34.
T B
ON
SRV-ON
BRK-OFF
Motor speed
Released
OFF
Retained
Motor energized
Energized De-energized
30 r/min
Standard Default Setup: [ ]
When you use an external regenerative resistor, be sure to install such an
external safeguard as a temperature fuse, etc.
Otherwise, protection of a regenerative resistor may be lost, resulting in abnormal
heat generation and burnout of the regenerative resistor.
Do not touch an external regenerative resistor.
Otherwise, an external regenerative resistor will be hot and may cause burn injury.
• An optional external regenerative resistor has a built-in temperature fuse for safety reasons. The built-in
temperature fuse may be disconnected depending on heat dissipation conditions, range of use
temperatures, supply voltage, and fluctuations of load.
• Configure the machine so that surface temperature of a regenerative resistor is kept below 100˚C, even
when regeneration is apt to occur and the machine is placed under poor conditions (i.e., high supply
voltage, high load inertia, and short deceleration time). Also be sure to check that it can run properly.
Range of
Settings
Settings
0
1
2
[3]
Regenerative
resistors to be used
–
Externally instaled
resistor
Externally installed
resistor
–
Protection against overload of
regenerative resistors
As regeneration processing circuit does not
run, a built-in condenser handles all of
regenerative power.
With the operating limit of an externally
installed resistor set to 10% duty, activate
protection against overload of regenerative
resistors (alarm code 18).
The protection against regenerative overload
does not work.
As regeneration processing circuit does not
run, a built-in condenser handles all of
regenerative power.