Siemens Sinumerik 840D Series Function Manual page 78

3 Startup
3.11 Start-up functions
Measurement of
velocity control
loop
3-78
20.000
Ampl.
[dB]
-60.000
1.000
+180
Phase
[degrees]
-180
1.000
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
Reference Velocity setpoint in velocity controller
frequency re- cycle, valve control loop closed, velocity
sponse control loop closed
Setpoint step Velocity setpoint in velocity controller
change cycle, valve control loop closed, velocity
control loop closed
Interference Valve spool setpoint in velocity controller
frequency re- cycle, valve control loop closed, velocity
sponse control loop closed
Disturbance Valve spool setpoint in velocity controller
step change cycle, valve control loop closed, velocity
control loop closed
Velocity con- Valve spool setpoint in velocity controller
troller path cycle, valve control loop closed, velocity
control loop closed
Velocity con- Velocity setpoint in velocity controller
troller path + cycle, valve control loop closed, velocity
controller control loop closed
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
log [Hz]
log [Hz[]
Trigger
Actual velocity value/
velocity setpoint
Measured variable 1:
S
S
Measured variable 2:
Actual velocity
Actual velocity value/
valve spool setpoint
Measured variable 1:
Valve spool setpoint
Measured variable 2:
Actual velocity
Actual velocity value/
actual valve spool value
Actual velocity value/
control deviation
 Siemens AG, 2003. All rights reserved
10.03
1.000e+03
1.000e+03
Measured quantities
Velocity setpoint
valve spool setpoint