Endress+Hauser Proline Prosonic Flow 93C Description Of Device Functions page 49

Device functions Proline Prosonic Flow 93C PROFIBUS DP/PA
Endress+Hauser
OUTPUTS → PULSE/FREQUENCY OUTPUT 1 → CONFIGURATION (FREQUENCY)
END VALUE FREQ.
!
(4203)
This function is not available unless the FREQUENCY setting was selected in the
OPERATION MODE function (4200).
Use this function to define an end frequency for the frequency output. You define the
associated measuring value of the measuring range in the VALUE-f HIGH function (4205)
on Page 50.
User input:
5-digit fixed point number 2 to 10000 Hz
Factory setting:
10000 Hz
Example:
• VALUE-f HIGH = 1000 l/h, full scale frequency = 1000 Hz: i.e. at a flow of 1000 l/h,
• VALUE-f HIGH = 3600 l/h, full scale frequency = 1000 Hz: i.e. at a flow of 3600 l/h,
!
In the FREQUENCY operating mode the output signal is symmetrical (on/off ratio = 1:1).
At low frequencies the pulse duration is
limited to a maximum of 2 seconds, i.e. the on/off ratio is no longer symmetrical.
VALUE-f LOW
!
(4204)
This function is not available unless the FREQUENCY setting was selected in the
OPERATION MODE function (4200).
Use this function to assign a value to the start value frequency (4202).
The value can be higher or lower than the value assigned to the VALUE-f HIGH.
Positive and negative values are permissible, depending on the measured variable in
question (e.g. volume flow). You define a measuring range by defining the VALUE-f LOW
and VALUE-f HIGH values.
User input:
5-digit floating-point number
Factory setting:
0 [unit]
!
• For a graphic illustration of the VALUE-f LOW (see the VALUE-f HIGH function).
• The appropriate unit is taken from the UNIT VOLUME FLOW function (0402) →
Functional description
(only with PROFIBUS DP)
Note!
a frequency of 1000 Hz is output.
a frequency of 1000 Hz is output.
Note!
Note!
Note!
Page 13.
6 Block OUTPUTS
49