Siemens SIMATIC FM 453, Руководство пользователя

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7-22
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
For the following position-controller optimization, it is important to know the
drive time constant (transition time). In open-loop control mode and on errors
with the response “Everything Off” (see Section 11) the voltage value is fed
to the drive by way of a ramp defined in MD45. A variety of drives, as well
as certain mechanical or technological situations, may require a limitation on
the voltage rise. If you do not have a specific value in hand and wish to find a
suitable rise value by trial and error, please use the following procedure:
Note
A voltage rise setting will obviously make the axis stop more slowly if an
“Everything Off” error response occurs.
Select
Mode = Control
Voltage level 2
Set
Voltage level 1 = 0
Voltage level 2 = U
a
= U
max
Set
Servo enable = ON
Start axis
Plus or minus direction
(be sure there is enough room!)
Axis acceleration too high?
Parameterization
MD45 – Voltage ramp lower
Set
Activate machine data
No
Yes
No
Yes
END
Axis acceleration too low?
Parameterization
MD45 – Voltage ramp higher
Set
Activate machine data
Was voltage level 2 = U
max
?
Set
Raise voltage level 2
(up to U
a
= U
max
)
Read drive time constant (Ta) from
servicing data
No
Yes
Start axis
Plus or minus direction
(be sure there is enough room!)
If controlled drive of the axis at U
max
is not possible
without a voltage ramp, set voltage level 2 to a value
U
a
< U
max
and calculate the real drive time constant
Ta
real
from the measured time constant Ta, as:
Ta
real
= Ta
@
U
max
: U
a
Fig. 7-9 Drive Transition Time and Maximum Voltage Rise
Drive Transition
Time and Maxi-
mum Voltage Rise
Starting up the FM 453