52 Mentor ll User Guide
www.controltechniques.com Issue Number: 12
Integrating time for 05.06. For use in conjunction with 05.07,suchthat
05.07 < 05.08.
Time t to reset is:
ReferalsotoMenu10,parameter10.18.
To disable the overload trip parameter 05.07 and 05.08 should be
set to 0.
To autotune the current loop during start up:
• Disconnect the field of the motor if a fixed field is being used.(Open
terminals L11 and L12 in the European version of the Drive).
• Observe approved safety procedures!
• Enable autotune set 05.09 =1.
• Enable the Drive by the input TB4-31.
When the autotune process is complete, the Drive ready relay will open
for 50ms after which the autotune parameter will be automatically set to
disable (05.09 = 0). The purpose of this process is to allow the autotune
sequence to be started when a run permit is present but to return the
Drive to a safe condition when the autotune is complete. It may be
necessary to clamp the motor shaft if it tends to rotate during this
procedure.
1 The foregoing assumes that the Drive ready relay is interlocked
with any run permit that is present.
2 If the motor is being operated with field control (Menu 06), the
field will be turned off automatically.
3 Alters parameters 5.12 - 5.15.
The endstop allows the armature voltage to rise, during regeneration, to
1.16 x supply voltage. On very soft supplies the endstop may be too
close to the crossover point. Setting 05.10 = 1 increases the safety
margin but reduces the maximum regenerated armature voltage to 1.05
x supply voltage.
Setting this parameter may be necessary in series 12 pulse systems.
Monitors the value of the integrating current-time overload. When the
value reaches the trip point determined by 05.06, 05.07 and 05.08,an
overload trip occurs. The overload trip will operate when 05.11 reaches
the value given by:
The rate at which 05.11 increases or decreases is controlled by the
values of 05.07 and 05.08 respectively.
To disable the overload trip parameter 05.07 and 05.08 should be
set to 0.
Set by the Start-up Autotune parameter 05.09.
This parameter is set to correct any errors in the prediction of firing angle
in the discontinuous current region. If 05.15 is set correctly, 05.12 has
little effect, but if set too high, instability can occur.
Set by the Start-up Autotune parameter 05.09.
This parameter allows the current loop to follow very closely a step-
change in current. If set too high, there will be an overshoot. If set too
low, the new current value will be achieved unduly slowly.
Set by the Start-up Autotune parameter 05.09.Itsvaluewilldependon
the motor time-constant. Increasing the value of 05.14 will improve the
response of the current loop but at the risk of instability.
If this parameter is set too low an error between the value of the ‘Current
Demand’ and the ‘Current Feedback’ can result.
This parameter is not set by the continuous autotune routine.
05.08 Overload integrating time (cooling)
RW Uni
ô
0~255
ð
050 S
05.09 Enable start-up autotune
RW Bit
ô
0or1
ð
0, disabled
05.10 Reduced endstop
RW Bit
ô
0or1
ð
0
t05.08()
1000 05.06()–
05.06()05.01()–
---------------------------------------------
×=
NOTE
NOTE
05.11 Actual overload
RO Uni
ô
0 ~ 1999
ð
05.12 Discontinuous integral gain
RW Uni
ô
0~255
ð
16
05.13 Continuous proportional gain
RW Uni
ô
0~255
ð
16
05.14 Continuous integral gain
RW Uni
ô
0~255
ð
16
1000 05.06()–()
10
16
---- --
×
NOTE
GainApplied
ValueOf05.12
128
----------------------------------------
=
GainApplied
ValueOf05.13
256
----------------------------------------
=
GainApplied
ValueOf05.14
512
----------------------------------------
=
NOTE
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