RHEONIK ETx, Руководство по эксплуатации

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Rh eo n i k M esst ech n i k RE V . L O ct o b er 2014
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RHEONIK Coriolis Flowmeter Operation Manual RHE 07, 08, 11 Page 35
6.4. Examples with explanation
Example 1:
We have a 1 stage batch process (1 batch valve) and want to batch a quantity of 100 kg:
Pset
to be set on 100 kg
Pwarn to be set on an estimated value depending on the delay time i.e.: 2 kg
If the option aoc (automatic overflow control) is not activated the
Pwarn
value will always
be activated at 98 kg and will close the valve. The
Pset
output will not be connected to
any valve in this configuration.
If "aoc" is active, the
Pwarn value will be controlled or optimized automatically in such a
way that the
Pset
value will be reached after several batches.
Example 2:
We have a 2 stage batch process with one valve for the main flow and 1 valve for the
small flow. The output for
Pset
will be connected to the small flow valve and the output
for
Pwarn
to the main flow valve.
Pset to be set to 100 kg
Pwarn
to be set to an estimated value depending on the delay time i.e.: 2 kg
The "aoc" can not be activated now!
The main flow valve will close at 98 kg and the small flow valve will close at 100 kg. This
means that still a very small overflow will appear. This can be eliminated by changing the
Pset
value to a smaller corresponding value.
6.5. Serial interface and batch option
In addition to the standard serial interface requests and actions there are additional
codes that can be used with option code "batch" active only.
Requests: format:
______________________________________________________________
print Preset value: 7FH,7FH, ’#’ , <A> , ’BRs’ , ’?’ ,0D,0A,7FH,7FH
print
Prewarn
value:
7FH,7FH, ’#’ , <A> , ’BRw’ , ’?’ ,0D,0A,7FH,7FH
write
Preset
value:
7FH,7FH, ’#’ , <A> , ’BWsXXXXXXXEE’ ,0D,0A,7FH,7FH
write
Prewarn
value:
7FH,7FH, ’#’ , <A> , ’BWwXXXXXXXEE’ ,0D,0A,7FH,7FH
X: ‘0’ , ‘1’ , ... ’9’ or ‘.’
EE: mass unit characters i.e. ‘kg’
Actions: format:
______________________________________________________________
batch Start : 7FH,7FH, ’#’ , <A> , ’Bst’ ,0D,0A,7FH,7FH
batch
Stop
:
7FH,7FH, ’#’ , <A> , ’Bsp’ ,0D,0A,7FH,7FH
batch
Clear
: *
)
7FH,7FH, ’#’ , <A> , ’Bsc’ ,0D,0A,7FH,7FH
*
)
not for program versions before 1.24 (M221299)