Siemens SITRANS P DS III - Electronics Temperature Transducer Block

Operator control functions via PROFIBUS
7.1 Communications structure for PROFIBUS PA
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
103
Variable
Measurement type
Pressure
Level
Volume
Volume flow
Mass flow
Measurement value
(primary variable)
P L V F F
Secondary variable 3
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M
P
Pressure
F
Volume flow
L
Level
M
Mass flow
V
Volume
For the measurement values (primary variables) you can also set the unit "%" for all
measurement types.
Secondary variable 2 is a value normalized to one in all measurement types. The unit is fixed
at "none".
See also
Unit (Page 84)
7.1.4
Electronics temperature transducer block
The electronics temperature transducer block is manufacturer-specific and not described in
the profile. The transducer block is responsible for monitoring the internal temperature of the
device electronics. The transducer block cannot change the pressure value, only its status.
The permissible limits correspond to those of the permissible ambient temperature. If a limit
is violated, the status changes to "GOOD – Active Critical Alarm – High/Low-limit". The
status of the cleaned-up pressure value in the pressure transducer block receives the status
"UNCERTAIN – Value not accurate – high/low-limit". This procedure is accompanied by a
PROFIBUS diagnostic message "Electronics temperature too high".
There are also peak indicators for maximum and minimum values available.
See also
Min/max indicator (Page 122)
Status (Page 162)