Siemens SINUMERIK 840D Description Of Functions page 135

02.99
5112 VALVE_FLOW_FACTOR_A_B
Valve flow ratio betw. A and B ends
Unit: Default:
– 1.0
5114 VALVE_NATURAL_FREQUENCY
Valve natural frequency
Unit: Default:
Hz 150.0
5115 VALVE_DAMPING
Valve damping
Unit: Default:
– 0.8
Special features
5113 VALVE_CONFIGURATION
Valve configuration
Bit 0= 0: Directly actuated valve
1: Pilot-actuated 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 2000. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
A valve characteristic as shown in Fig. 2-10 results in an entry of 10 % in
MD 5110 and 40 % in MD 5111. Entering the same value in both machine data
produces a linear characteristic (default setting).
Minimum: Maximum:
0.5 2.0
The flow ratio specifies the ratio between the rated flow towards the A end and
the rated 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 spool position is approximated as a PT2
low-pass.
The valve natural frequency can be read off at a phase shift of –180°. The natu-
ral valve frequency with a valve modulation of 10 % in relation to 100 bar pilot
pressure is stated 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 stated in MD 5115.
To allow special valve features to be taken into account, machine data MD 5113
with control bits has been introduced.
01: Fail safe closed
10: Fail-safe open
11: –
Minimum: Maximum:
0 1F
4 Firmware Drive Functions
Cross ref.: –
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
FLOAT Immediately
Cross ref.: –
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
FLOAT Immediately
Cross ref.: –
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
FLOAT Immediately
Cross ref.:–
Relevant for: Protection level:
HLA 3/3
Data type: Effective:
UNS.WORD Immediately
4.7 Valve
4-135