Endress+Hauser Proline Prosonic Flow 93C Description Of Device Functions page 52

6 Block OUTPUTS
52
OUTPUTS → PULSE/FREQUENCY OUTPUT 1 → CONFIGURATION (FREQUENCY)
MEASURING MODE
!
(4206)
This function is not available unless the FREQUENCY setting was selected in the
OPERATION MODE function (4200).
Use this function to define the measuring mode for the frequency output.
Options:
STANDARD
SYMMETRY
PULSATING FLOW
Factory setting
STANDARD
Description of the individual options:
• STANDARD
• SYMMETRY
!
• The direction of flow can be output via the configurable relay or status outputs.
• SYMMETRY cannot be selected unless the values in the VALUE-f LOW (4204) and
Device functions Proline Prosonic Flow 93C PROFIBUS DP/PA
Functional description
(only with PROFIBUS DP)
Note!
The frequency output signal is proportional to the measured variable. The flow
components outside the scaled measuring range (defined by the VALUE-f LOW
n
the VALUE-f HIGH ) are not taken into account for signal output.
– If one of the values is defined as equal to the zero flow (e.g.
3
VALUE-f LOW = 0 m /h) no message is given if this value is exceeded or not
achieved and the frequency output retains its value (0 Hz in the example). If the
other value is exceeded or not achieved, the message "FREQUENCY OUTPUT
AT FULL SCALE VALUE" appears and the frequency output responds in accordance
with the parameter setting in the FAILSAFE MODE function (4209).
– If both values are defined as not equal to the zero flow (for example
3
VALUE-f LOW = –5 m /h; VALUE-f HIGH = 10 m
"FREQUENCY OUTPUT AT FULL SCALE VALUE" appears if the measuring range is
exceeded or not achieved and the frequency output responds in accordance with
the parameter setting in the FAILSAFE MODE function (4209).
Freq.
125
100
0
➀
The frequency output signal is independent of the direction of flow (absolute amount
of the measured variable). The VALUE-f LOW
the same sign (+ or -). The VALUE-f HIGH
n
mirrored VALUE-f HIGH (e.g. flow).
➂
Note!
VALUE-f HIGH (4205) functions have the same sign or one of the values is zero. If the
signs of the two values differ, SYMMETRY cannot be selected and an "ASSIGNMENT
NOT POSSIBLE" message is issued.
(continued on next page)
3
/h), the message
Q
➁
m
and VALUE-f HIGH
o
(e.g. backflow) corresponds to the
Freq.
125
100
0 Q
➀ ➁
Endress+Hauser
m
and
A0001279
n
must have
A0001280