MPU Series B
Ultrasonic Gas Flow Meter
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PRD-0000022543 Rev. 00D
Page 13 of 28
MNKS008 0.0 (4/08)
4. REGISTER USAGE
Figure 1
below describes the most common way to implement a
master application that is synchronised with the MPU Series B.
In this example, the master application running on an external flow
computer is responsible for writing the correct pressure and
temperature to the MPU Series B.
Read object 0
Start
Read objects of
interest from the
database
Object 0
changed?
Store values
in flow computer
memory
Write pressure &
temperature to
objects 10000
and 10001
Wait 3 seconds
NO
YES
Figure 1 - Flow Computer Application Example
4.1.
The MPU Series B Alarm Status
The MPU Series B Alarm Status is a bit coded value indicating the
state of the MPU Series B alarms. To correctly interpret the bits, the
32-bit float value has to be converted into a 32-bit integer value. The
table below shows the alarm bits used and their interpretation.
Bit Value Alarm interpretation
0 1
High
Flow
Alarm
1 2
Hardware
Error
2 4
Transducer
Failure
3 8
Calculation
Failure
4
16
Burst Percent Low
5 32 Gain
Error
6
64
Velocity-of-sound difference too large
7
128
Flow corrections active
