7.14.4 Function block
GUID-9F81E8FA-B3AC-4479-B946-0097C0B5DCA4 v1
ANSI10000298-1-en.vsd
STTIPHIZ (64S)
USV*
USI*
BLOCK
ZREFSEL
TRIP
BFI
ALARM
OPCIRC
ERROR
ERRSTAT
RAVE
XAVE
FREQV
RFAULT
ZREF
ZREFRE
ZREFIM
VRMSSTAT
ANSI10000298 V1 EN-US
Figure 221: STTIPHIZ (64S) function block
7.14.5 Signals
PID-6804-INPUTSIGNALS v2
Table 189: STTIPHIZ (64S) Input signals
Name Type Default Description
USV GROUP
SIGNAL
- Injected voltage signal
USI GROUP
SIGNAL
- Injected current signal (voltage over shunt)
BLOCK BOOLEAN 0 Block of function
ZREFSEL INTEGER 1 Reference impedance selection
PID-6804-OUTPUTSIGNALS v2
Table 190: STTIPHIZ (64S) Output signals
Name Type Description
TRIP BOOLEAN Trip
BFI BOOLEAN Initiate
ALARM BOOLEAN Alarm
OPCIRC BOOLEAN Injection circuit open
ERROR BOOLEAN Error
ERRSTAT INTEGER Error indication
RAVE REAL Measured resistance to earth in Ohm at inj freq
XAVE REAL Measured reactance to earth in Ohm at inj freq
FREQV REAL Measured frequency of injected voltage into stator
RFAULT REAL Estimated fault resistance in Ohm
ZREF INTEGER Selected reference impedance number
Table continues on next page
Section 7 1MRK 502 066-UUS B
Impedance protection
412
Technical manual
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