Csp, Current Setpoint Calculation - Siemens SIMADYN D Manual

Closed-loop thyristor current control
CAV.
YFI Frequency [kHz] of the V/f conversion of the current actual value
(uncorrected value)
YFO Offset actual value [kHz]
YFO =
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.
YAU Limit of the current-dependent inverter stability limit [ ° ]
Interdependencies: Value > 0, if XF2 > 0
TCC Internal measuring time of the current actual value conversion
[ms]
ACO Handshake for PC6 block
QSF Fault
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
Fig. 5-16 CSP represented in the CFC
Setpoint
smoothing
5-34
Significance
YFI - 60[kHz] - XFO
is used, in conjunction:
CSP
GV AD
R WC
R WCU
R WCL
R GLI
R IL
Enable
BO EN
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.
YCW R Current setpoint, smoothed (abs. value)
YE R New-old difference (with sign)
QCL BO Current limit reached
QIU BO Pos. inhibit, integrator
QIL BO Neg. inhibit, integrator
ZVA INT Diag.:Status
System- and communication configuring D7-SYS - SIMADYN D
Value\connection
(Default: 0.0)
(Default: 0.0)
(Default: 0.0)
CAV.YAU → CPI.CLU
→ PC6.AWS
(Default: 0 ms)
CAV.ACO → PC6.ACI
(Default: 0)
CAV.QSF → SOL.QSC
(Default: 16#0000)
Edition 06.2002