Non-Resettable Counter Function; Firmware Description; Dsp Module - fluenta FGM 160 Operating Instructions Manual

FGM 160 Operating Instructions
3.1.6

Non-Resettable Counter Function

The non-resettable counter function will record and keep the totalized volume and mass. The
totalized values are accessible through the DCS Modbus interface or through UFM Manager.

3.2 Firmware Description

In the following sections a general description of the firmware for the different modules is
outlined.
3.2.1

DSP Module

•
The DSP Module initializes the system at start-up. Tasks are set to initial states and
the system is ready for operation.
•
The signals transmitted by the ultrasound transducers are generated by the DSP
Module. The sequencing is controlled by this module, and, depending on the velocity
of the medium in the pipe, either both Chirp and CW signals or just Chirp signals are
used for the flow measurements. One ultrasonic transit time measurement is always
succeeded by an ultrasonic transit time measurement in the opposite direction.
•
Data sampling and signal processing are carried out after a specified number of
sequences. Then, the DSP module calculates the difference in transit time
measurements and calculates the parameters available in the FGM system.
•
Flow velocity and volume flow rate calculations run continuously, calculating new
values based on data from the P&T module and transit time measurements from the
ultrasonic transducers.
72.120.601
Figure 3 Electronic modules
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