Endress+Hauser Proline Promass 83 - Group ADVANCED DIAGNOSTICS

7 Block OUTPUTS Device Functions Proline Promass 83 MODBUS RS485
72 Endress+Hauser
Parameter setting examples for
the frequency output
Parameter setting example 1:
VALUE F LOW (4204) = not equal to zero flow (e.g. −5 m
3
/h, 10m
3
/h)
VALUE F HIGH (4205) = not equal to zero flow (e.g. 100 m
3
/h, −40m
3
/h)
MEASURING MODE (4206) = STANDARD
When you enter the values for VALUE F LOW and VALUE F HIGH the working
range of the measuring device is defined. If the effective flow drops below or
exceeds this working range (see Fig. m), a fault/notice message is generated
(#355-358, frequency area) and the frequency output responds in accordance
with the parameters set in the function FAILSAFE MODE (4209).
A0001276
Parameter setting example 2:
VALUE F LOW (4204) = equal to zero flow (e.g. 0 m
3
/h)
VALUE F HIGH (4205) = not equal to zero flow (e.g. 10 m
3
/h)
or
VALUE F LOW (4204) = not equal to zero flow (e.g. 100 m
3
/h)
VALUE F HIGH (4205) = equal to zero flow (e.g. 0 m
3
/h)
and
MEASURING MODE (4206) = STANDARD
When you enter the values for VALUE F LOW and VALUE F HIGH the working
range of the measuring device is defined. In doing so, one of the two values is
parameterized as zero flow (e.g. 0 m
3
/h).
If the effective flow drops below or exceeds the value parameterized as the zero
flow, no fault/notice message is generated and the frequency output retains its
value.
If the effective flow drops below or exceeds the other value, a fault/notice
message is generated (#355-358, frequency area) and the frequency output
responds in accordance with the parameters set in the function FAILSAFE MODE
(4209).
A0001277
Deliberately only one flow direction is output with this setting and flow values in
the other flow direction are suppressed.
Parameter setting example 3:
MEASURING MODE (4206) = SYMMETRY
The frequency output signal is independent of the direction of flow (absolute
amount of the measured variable). The VALUE F LOW m and VALUE F HIGH n
must have the same sign (+ or -). The “VALUE F HIGH” o (e.g. backflow)
corresponds to the mirrored VALUE F HIGH n (e.g. flow).
A0001278
ASSIGN RELAY (4700) = FLOW DIRECTION
Flow direction output via a switching contact.
Parameter setting example 4:
MEASURING MODE (4206) = PULSATING FLOW
If flow is characterized by severe fluctuations as is the case, for example, with
reciprocating pumps, flow components outside the measuring range are buffered,
balanced and output after a delay.
If the effective flow drops below or exceeds the defined working range, normally
no fault message or notice message is generated.
Function description
OUTPUTS → PULSE/FREQUENCY OUTPUT 1 → CONFIGURATION (FREQUENCY)
-5 0 0
-40
0
0
125 125
10 100
Hz Hz
mm
33
/h /h
➀➀➀➀
00
0
0
125
125
10 100
Hz Hz
mm
33
/h /h
➀➀
Q
125
Hz
0
➀➁➂