VEGA VEGAFLEX 81 Foundation Fieldbus Coax probe - Manuale (Pagina 76)

76
11 Appendice
VEGAFLEX 81 • Foundation Fieldbus
44215-IT
-130930
Electricial Characteristics Physicial Layer Type Low-power signaling,
bus-powered, FISCO I.S.
Input Impedance > 3000 Ohms between
7.8 KHz - 39 KHz
Unbalanced Capacitance < 250 pF to ground from either
input terminal
Output Amplitude 0.8 V P-P
Electrical Connection 2 Wire
Polarity Insensitive Yes
Max. Current Load 10 mA
Device minimum operating voltage 9 V
Transmitter Function Blocks Resource Block (RB) 1
Transducer Block (TB) 1
Standard Block (AI) 3
Execution Time 30 mS
Advanced Function Blocks Discret Input (DI) Yes
PID Control Yes
Output Splitter (OS) Yes
Signal Characterizer (SC) Yes
Integrator Yes
Input Selector (IS) Yes
Arithmetic (AR) Yes
Diagnostics Standard Yes
Advanced Yes
Performance No
Function Blocks Instantiable No
General Information LAS (Link Active Scheduler) Yes
Master Capable Yes
Number of VCRs (Virtual Communication Re-
lationships)
24
Blocchi funzionali
Transducer Block (TB)
Il blocco funzionale "Analog Input (AI)" raccoglie il valore di misura originario (Secondary Value 2),
esegue la taratura min./max. (Secondary Value 1), esegue una linearizzazione (Primary Value) e
mette a disposizione i valori sulla sua uscita per altri blocchi funzionali.