Siemens SIMATIC FM 453, Руководство пользователя

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9-77
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
The following relationship applies for these characteristics:
The better the axis design, the greater the achievable K
v
factor, and the better
the axis parameters from the technological viewpoint. The size of the K
v
fac-
tor is especially affected by the time constants, backlash and spring compo-
nents in the controlled system. In real applications the K
v
factor moves
within the following bandwidth:
S
K
v
= 0.2...0.5 poor-quality axis
S
K
v
= 0.5...1.5 good axis (normal case)
S
K
v
= 1.5...2.5 high-quality axis
The MD38 value is input with a resolution of 10
3
, so that the following input
value results:
Speed
Following error
=
v [10
3
MSR/min]
∆
s [MSR]
10
3
MD38 = 10
3
K
v
= 10
3
MD Designation Value/Meaning Unit
38 Positioning loop amplifi-
cation 1 – 10,000 [(MSR/min)/MSR]
Basic diagnostics
In servo-controlled mode, the manipulated variable is compared periodically
with the possible maximum values (
10 V or maximum frequency). A
violation of the maximum limit is interpreted as follows:
No axis movement: “No drive movement” error message
(see Table 11-7, Class 3/No. 65)
Traverse in the opposite direction: “Direction of drive rotation” error message
(see Table 11-5, Class 1/No. 11)
Correct travel direction: Overrange message in status message 1
(see Section 9.3.16, Additional operating
data)
In all operating modes except Open-loop control mode, the “controller en-
able” signal is required for the duration of every traversing movement, irre-
spective of the parameter definitions. If the controller enable is not detected
or is deactivated during the movement, the “servo enable missing” message
is triggered (see Table 11-5, Class 3/No. 61).
In all operating modes except Open-loop control mode, the “servo ready”
signal is required for the duration of every traversing movement when the
parameter is active (MD37.2). If the servo ready signal is not detected or is
deactivated during the movement, the “servo not ready” message is triggered
(see Table 11-5, Class 3/No. 62).
Controller
Diagnostics
Description of Functions