Siemens D7-SYS - Page 458

Closed-loop thyristor current control
5-18 System- and communication configuring D7-SYS - SIMADYN D
Edition 06.2002
EMF. Significance Value\connection
AAV
Line supply voltage [V].
Condition:
3
2
ARV AAV
π∗
⋅≥
, otherwise, QSF\bit14= 1
(Default: 0.0)
XFO
Offset frequency of the V/f converter [kHz]
Measurement for a drive converter output voltage = 0[V] !
Calibration/adjustment: XFO =
- YFO !
Condition: -6 kHz
≤XFO≤ 6 kHz, otherwise, QSF\bit 14 = 1
(Initialization connection/
default: 0.0)
RA
Normalized armature resistance
(this should be calculated from the determined value)
(Default: 0.0)
TA
Armature time constant [ms] (Default: 0 ms)
T
Smoothing time for YEV value
(with T=0, smoothing is disabled)
(Default: 20 ms)
XC
Current actual value (with sign)
to calculate the voltage drop of armature quantities
CAV.YC
→ EMF.XC
ACI
Handshake from the PC6 block
PC6.ACO
→ EMF.ACI

YEM Calculated EMF actual value
YULYURYUAYEM −−=
(this value is too inaccurate for other calculations as the value
calculated for YUL is only approximate!)
(Default: 0.0)
YUA Drive converter output voltage
(Default: 0.0)
YUR Ohmic voltage drop across the DC motor
XCRA
armature
IR YUR ∗=∗=
(Default: 0.0)
YUL
Inductive voltage drop across the DC motor
()
1n
XC
n
XC
TA
R
A
dt
di
LYUL
−
−∗==
(Default: 0.0)
YEV
EMF value normalized to the no-load line supply amplitude
YEM
AAV
RRV
23
YEV ∗∗
π
=
(smoothed with time T)
EMF.YEV
→ SOL.XEV
(Default: 0.0)
YFU
Frequency of the voltage actual value [kHz] (of the V/f
conversion)
without correction
(Default: 0.0)
YFO Offset actual value [kHz]
XFO - 60[kHz] - YFIYFO =
(Default: 0.0)
TCC
Measuring time, voltage measurement (Default: 0 ms)
ACO
Handshake for CAV block
EMF.ACO
→ CAV.ACI
(Default: 0)
QSF
Fault
EMF.QSF
→ SOL.QSM
(Default: 16#0000)
Table 5-2 EMF I/O