Siemens SIMADYN D User Manual

Closed-loop thyristor current control
5-34 System- and communication configuring D7-SYS - SIMADYN D
Edition 06.2002
CAV. Significance Value\connection
YFI
Frequency [kHz] of the V/f conversion of the current actual value
(uncorrected value)
(Default: 0.0)
YFO
Offset actual value [kHz]
XFO - 60[kHz] - YFIYFO =
When the closed-loop thyristor current control is switched-out
(I=0), the frequency at YFO corresponds to the offset error of the
V/f converter in the Sitor. The output only indicates values up to
10% of the system current.
(Default: 0.0)
YAU
Limit of the current-dependent inverter stability limit [°]
is used, in conjunction:
Interdependencies: Value > 0, if XF2 > 0
(Default: 0.0)
CAV.YAU → CPI.CLU
→ PC6.AWS
TCC Internal measuring time of the current actual value conversion
[ms]
(Default: 0 ms)
ACO Handshake for PC6 block
CAV.ACO → PC6.ACI
(Default: 0)
QSF
Fault
CAV.QSF → SOL.QSC
(Default: 16#0000)
Table 5-7 I/O CAV
5.2.5 CSP, current setpoint calculation
Hardware address
Current setpoint (with sign)
Pos. I_max (abs. value)
Neg. I_max (abs. value)
Gradient, setpoint smoothing
Gradient, integrator inhibit
Enable
GV
R
R
R
R
R
BO
A
D
WC
WCU
WCL
GLI
IL
EN
CSP
YCW
YE
QCL
QIU
QIL
ZV
A
R
R
BO
BO
BO
INT
Current setpoint, smoothed (abs. value)
New-old difference (with sign)
Current limit reached
Pos. inhibit, integrator
Neg. inhibit, integrator
Diag.:Status
Fig. 5-16 CSP represented in the CFC
The current setpoint (SOL.YWC) is limited to the absolute value of the
current limits CSP.WCU and CSP.WCL.
To smooth the setpoint, the difference between setpoint CSP.WC and the
CSP.YCW current setpoint, output in the previous cycle, is formed and is
output at CSP.YE.
The difference, compared with parameter GLI, decides the change of
output YCW
If the difference > GLI, then the value of GLI is output.
If the difference < GLI, but, > GLI/2, this is limited to GLI/2.
If the difference <GLI/2, this is transferred without any correction.
The result is added to output YCW with the correct sign.
The absolute value of the smoothed and limited current setpoint is output
at CSP.YCW.
Setpoint
smoothing

Siemens SIMADYN D Specifications

General

Brand	Siemens
Model	SIMADYN D
Category	Control Systems
Language	English