VEGA VEGASCAN 693 - Manual (Page 17)

17
6 Setup with the integrated display and adjustment unit
VEGASCAN 693 • 15-channel HART signal conditioning instrument
29252-EN-130701
Note:
Approx. 10 minutes after the last pressing of a key, an automatic reset
to measured value indication is triggered. Any values not confirmed
with [OK] will not be saved.
6.2 Setup steps
The instrument is adapted to the individual application conditions
via parameter adjustment. The measurement point calibration is the
most important step and should always be carried out. Scaling the
measured value to the desired size and unit, possibly also taking a
linearization curve into account, makes sense in many cases.
Instruments with Ethernet interface can be provided with a Host name
suitable for the measurement loop. As an alternative to the addressing
via DHCP, it is also possible to adjust an IP address and subnet mask
suitable for your network. If necessary, the e-mail/Web server can be
also configured with PACTware.
Information:
When using PACTware and the corresponding VEGA DTM, additional
settings can be carried out which are not possible or only partly pos-
sible with the integrated display and adjustment unit. When using an
adjustment software, you either need one of the integrated interfaces
(RS232/Ethernet) or the interface converter VEGACONNECT.
Further instructions for setting up the web server and e-mail func-
tions are stated in the online help of PACTware or the VEGASCAN
693 DTMs as well as the supplementary instructions manual "RS232/
Ethernet connection".
VEGASCAN 693 can process measured values of more than one
HART sensor. The measured values are transmitted as digital HART
signals to the same cable (bus). An analogue 4 … 20 mA transmis-
sion is not possible, the current is limited to 4 mA. An own, unam-
biguous address (address range 1-15) must be assigned to each
connected sensor. This mode is also called HART multidrop mode.
Address 0 (mode 4 … 20 mA) must not be used.
Note:
When addresses are being assigned, only one sensor must be con-
nected on the bus. If this is not the case, no sensor can be accessed
and it is not possible to assign an address.
The addressing can be carried out directly on each HART sensor via
the respective adjustment unit or adjustment software. As an alterna-
tive, the setting of the sensor address can be also carried out via the
VEGAMET menu under "Service - Sensor address" (see chapter
"Setup procedure" under "Service - Change sensor address").
After being switched on, VEGASCAN 693 first of all carries out a short
self-check. The following steps are carried out:
Parameter adjustment
Set HART address
Switch-on phase