10.03
3.11 Start-up functions
3-78
Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
20.000
-60.000
+180
-180
Ampl.
[dB]
Phase
[degrees]
1.000 1.000e+03log [Hz]
1.000 1.000e+03log [Hz[]
Fig. 3-29 Sample valve frequency response for type 4WRREH 6 HR servo solenoid
valves from Bosch Rexroth AG
Note: For setting the valve data, see Section 4.7.
Table 3-4 Measurement types and measured variables for the velocity control loop
measurement
Measure-
ment
Trigger Measured quantities
Reference
frequency re-
sponse
Velocity setpoint in velocity controller
cycle, valve control loop closed, velocity
control loop closed
Actual velocity value/
velocity setpoint
Setpoint step
change
Velocity setpoint in velocity controller
cycle, valve control loop closed, velocity
control loop closed
Measured variable 1:
S Velocity setpoint
S valve spool setpoint
Measured variable 2:
Actual velocity
Interference
frequency re-
sponse
Valve spool setpoint in velocity controller
cycle, valve control loop closed, velocity
control loop closed
Actual velocity value/
valve spool setpoint
Disturbance
step change
Valve spool setpoint in velocity controller
cycle, valve control loop closed, velocity
control loop closed
Measured variable 1:
Valve spool setpoint
Measured variable 2:
Actual velocity
Velocity con-
troller path
Valve spool setpoint in velocity controller
cycle, valve control loop closed, velocity
control loop closed
Actual velocity value/
actual valve spool value
Velocity con-
troller path +
controller
Velocity setpoint in velocity controller
cycle, valve control loop closed, velocity
control loop closed
Actual velocity value/
control deviation
Measurement of
velocity control
loop
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