DF4000 Rev0204
16
OPERATION
On power-up the flowmeter will be in the normal operating mode. Flow rate
information from a flow sensor or from the datalink interface is processed and displayed.
Operator input is necessary only when using the totalizing function or accessing
program information.
Datalink Interface
The FRC datalink interface is standard on all flowmeters and provides a way of
connecting multiple display modules on a shared data bus. The DF4000 (digital
flowmeter) and FP4000 (pressure gauge/flowmeter) series display modules can operate
as independent displays or they can be interconnected to provide remote displays, the
display of flow through multiple discharges (summing), and the display of total flow
for multiple discharges (accumulation). (Refer to Figure 6.)
Primary Display Module
Primary displays are programmed with the module function
Pri
. A primary display
receives input from the pressure transducer and flow sensor. When it is programmed
with Id 0 it will not output information on to the datalink. When it is programmed
with Id 1 to Id 99, it will provide information (via the datalink) to remote, summing,
and accumulator displays.
Remote Display Module
Remote displays are programmed with the module function
SLA
(slaved to a
primary). A remote display must be programmed with the same ID number as a primary
display. It will receive information for the display of flow rate from the primary display
over the datalink. All program code features are programmed independently of the
primary display. No calibration is necessary on a remote display.
Summing Display Module
Summing displays are programmed with the module function
SU
. A summing
display will show the actual flow rate for all primary displays on the datalink except
for those with Id 0.
Accumulator Display Module
Accumulator displays are programmed with the module function
ACC
. An
accumulator display will show total accumulated flow for all primary displays on the
datalink except for those with Id 0. The number shown in the display will be x 100
scale.
Note:
A single display module can be used for both summing and
accumulation. Program it as a summing display, when the
TOTAL
button
is pressed it will show total accumulated flow for all primary displays on
the datalink.
