EsiWelma TW1-M, User Manual

Page: 10 / 43

Type / N°
Rev. Fw Date Page Total pages
EW055.600D D 4L 6
th
June 2018
10 43
EsiWelma ® s.r.l.
2.2.6 Supply voltage blackout management
If during normal operation a supply voltage black out or even a blackout occurs, both when
nozzle is inserted and during delivery, the computing head enters a procedure called PWF
which allows to memorise: amount, quantity delivered and absolute totalizer. The data
display is maintained for about 30 minutes from the moment the network shortage occurred.
The power supply lack is visualized writing “OFF” on the unit price display. The network
shortage state is displayed by writing OFF on the unit price bar. When power supply is
restored, data related to interrupted delivery are read by the memory and visualised on the
display and send to the Host, if present.
2.3. Connection to Host
This computing head as its standard can be connected by
“Pumalan” 3 wire current loop TX,
RX, Gnd. Different connections are possible by adding an adapter. To use and implement
different protocols, a license released by manufacturer is needed.
Pumalan is a registered mark of GILBARCO (LOGITRON).
2.4. Euro
€
The standard computing head connection is foreseen with three cables, TX, RX, Gnd.
The computing head, by its set-up, can work with different foreign currencies: operator can
set the decimal digits in the unit price and in the amount. In any case operator can choose
quickly the Euro set by setting jumper J3: while starting, the computer head will set the
correct decimal digits.
Further, as requested from the
standard, in those countries,
which are approaching to the
Euro,
after the refuelling
process shown in local
currency, it’s possible
to
visualize the amount converted
in Euro by temporarily pushing
an appropriate button.
Figure 7: Temporary amount conversion to Euro
The standard rate DGII-C-4(99) is used as conversion factor.
By pushing the button for a second time, the visualization will switch back to the local
currency value. If another refuelling process should be started, the computing head switches
in any case to the normal visualization.
2.5. Delivery in Self-Service mode
In accordance with the Decree dated 11 September 2008, amendments and supplements to
Decree of Minister dated 24th May 2002 about the rules for fire prevention and planning,
construction and operation of distribution systems of natural gas for vehicles.
( GU n. 232 del
3-10-2008 )
Ps
Ps/Kg
Kg
p.u.
p.u.
Ps
Ps/Kg
Kg