Siemens SIMATIC FM 453 Manual page 277

The following relationship applies for these characteristics:
The better the axis design, the greater the achievable K
the axis parameters from the technological viewpoint. The size of the K
tor is especially affected by the time constants, backlash and spring compo-
nents in the controlled system. In real applications the K
within the following bandwidth:
The MD38 value is input with a resolution of 10
value results:
MD38 = 10
38
Controller
Basic diagnostics
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:
Traverse in the opposite direction: "Direction of drive rotation" error message
Correct travel direction:
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).
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
K = 0.2...0.5 poor-quality axis
v
K = 0.5...1.5 good axis (normal case)
v
K = 1.5...2.5 high-quality axis
v
Speed
3 3
K = 10
v
Following error
MD Designation
Positioning loop amplifi-
cation
Description of Functions
factor, and the better
v
factor moves
v
3
, so that the following input
v [10
3
= 10
∆s [MSR]
Value/Meaning
1 – 10,000 [(MSR/min)/MSR]
"No drive movement" error message
(see Table 11-7, Class 3/No. 65)
(see Table 11-5, Class 1/No. 11)
Overrange message in status message 1
(see Section 9.3.16, Additional operating
data)
fac-
v
3
MSR/min]
Unit
9-77