Siemens SIMATIC S7-300 Manual page 247

Jolt filter Without jolt limitation the acceleration and deceleration act as abrupt vari-
ables. Jolt limitation allows the break points of a ramp-like speed curve to be
smoothed out for both acceleration and deceleration. This yields particularly
"soft" (jolt-free) acceleration and braking for certain positioning tasks, such
as conveying of fluids.
Jolt time can be set in MD42 as the parameter for jolt limitation.
42
Basic diagnostics In servo–controlled mode, the manipulated variable is compared periodically
in the position with the possible maximum values ( 10 V or maximum frequency). A
control loop
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 Control mode, the "servo enable" signal is re-
quired for the duration of every traversing movement, irrespective of the pa-
rameter definitions. If the servo enable is not detected or is deactivated dur-
ing the movement, the "servo enable missing" message is triggered (see
Table 11-5, Class 3/No. 61).
FM 354 Servo Drive Positioning Module
Interpolator output signal
v
MD42
a
r
v – speed
a – acceleration
r – jolt
t – time
MD Designation
Jolt time 0...10,000
Description of Functions
Jolt filter output signal
Value/Meaning
[ms]
"No drive movement" error message
(see Table 11-7, Class 3/No. 65)
(see Table 11-5, Class 1/No. 11)
Oversteer message in status message 1
(see Section 9.3.16, Additional operating
data)
t
t
t
Unit
9-71