Siemens SINUMERIK 840D Description Of Functions page 87

02.99
Valve spool
setpoint (manipu-
lated voltage)
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
For an explanation of how to use the function generator, please refer to
References: /BF/, DD. "Speed Control Loop"
/TIM/, SIMODRIVE 611 "Manual for MK 172A"
An Overview of the function generator functions provided for HLA is given be-
low, with only the purely hydraulic-specific functionality for HLA described in
detail.
Table 3-8 Signal (operating mode) for valve spool setpoint
Trigger
Valve spool setpoint in velocity controller cycle, valve
control loop closed, velocity control loop open
Table 3-9 Parameterization of signal (operating mode) for valve spool setpoint
Parameter
Signal type: Square-wave
Amplitude
Period
Pulse width
Offset
Limitation
Tr. 1: Valve stroke setpoint
Tr. 2: Actual valve stroke
1.9890
2.0510
V
V
–2.0260
–2.0610
0.0000
Fig. 3-38 Servo trace of actual valve value with square-wave signal type to valve set-
point
3 Start-Up
3.11 Start-up functions
Signal type
Square-wave
Physical Unit
V
ms
ms
V
V
200.0000
t [ms]
3-87