Siemens Sinumerik 840D Series Function Manual page 135

02.99
10.03
5112 VALVE_FLOW_FACTOR_A_B
Valve flow rate ratio between A and B ends of valve
Unit: Default:
- 1.0
5114 VALVE_NATURAL_FREQUENCY
Natural frequency of valve
Unit: Default:
Hz 150.0
5115 VALVE_DAMPING
Valve damping
Unit: Default:
- 0.8
Special points to
be noted
5113 VALVE_CONFIGURATION
Valve configuration
Bit 0= 0: Directly-controlled valve
1: Pilot-controlled valve
Bit 2/Bit 1= 00: No fail-safe
Bit 3= 0: No differential circuit
1: Differential circuit
Bit4= 0: 7-pin connector
1: 12-pin connector
Unit: Default:
HEX 0
 Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
A valve characteristic as shown in Fig. 2-8 results in an entry of 10% in
MD 5110 and 40% in MD 5111. Entering the same value in both machine pa-
rameters produces a linear characteristic (default setting).
Minimum: Maximum:
0.5 2.0
The flow ratio specifies the ratio between the nominal flow towards the A end
and the nominal flow towards the B end.
Minimum: Maximum:
1.0 1000.0
Minimum: Maximum:
0.4 1.0
To dimension the velocity controller, the transmission behavior of the valve on
conversion of the voltage setpoint to the spool position is approximated as a
PT2 low-pass.
The valve's natural frequency can be read for a phase shift of -180°. The
valve's natural frequency for a valve modulation of "10% in relation to 100 bar
pilot pressure is specified in MD 5114.
The valve damping can be calculated from the amplitude overshoot at resonant
frequency for values of less than 0.7. The valve damping for a valve modulation
of "20% in relation to 100 bar pilot pressure is specified in MD 5115.
Machine parameter MD 5113 with control bits has been introduced to allow spe-
cial valve features to be taken into account.
01: Fail safe closed
10: Fail-safe open
11: -
Minimum: Maximum:
0 1
4 Firmware Drive Functions
4.7 Valve
Cross reference: -
Related to:
Protection level:
HLA
3/3
Data type: Active:
FLOAT Immediately
Cross reference: -
Related to:
Protection level:
HLA
3/3
Data type: Active:
FLOAT Immediately
Cross reference: -
Related to:
Protection level:
HLA
3/3
Data type: Active:
FLOAT Immediately
Cross reference: -
Related to:
Protection level:
HLA
3/3
Data type: Active:
UNS.WORD Immediately
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