Endress+Hauser Proline Promass 83 - Block SPECIAL FUNCTION

Device Functions Proline Promass 83 MODBUS RS485 7 Block OUTPUTS
Endress+Hauser 65
Detailed explanations and
information (continued)
How the current output responds at a defined measuring range
m-n (see Fig. 22) and flow behavior (see Fig. 23):
A0001272
Fig. 22 : Defined measuring range: m and n do not have the same sign
A0001273
Fig. 23 : Flow a (—) outside, b (- - -) within the measuring range
For STANDARD measuring mode
a (—): The flow components outside the scaled measuring range cannot be taken
into account for signal output.
A fault message is generated (# 351 to 354, current range) and the current output
responds in accordance with the parameter settings in the function
FAILSAFE MODE (4006).
b (- - -): The current output signal is proportional to the measured variable
assigned.
A0001274
Fig. 24 : Behavior of current output for STANDARD measuring mode
For SYMMETRY measuring mode
This option is not available under these circumstance, because the 0_4 mA value
and the 20 mA value have different signs.
For PULSATING FLOW measuring mode
Flow components outside the measuring range are buffered, balanced and output
after a maximum delay of 60 seconds.
A0001275
Fig. 25 : Behavior of current output for PULSATING FLOW measuring mode
TIME CONSTANT
MODBUS register:
Data type:
Access:
4005
5808
Float
read/write
Entering a time constant defines how the current output signal reacts to severely
fluctuating measured variables, either very quickly (enter a low time constant) or
with damping (enter a high time constant).
User input: fixed-point number 0.01 to 100.00 s
Factory setting: 1.00 s
Function description
OUTPUTS → CURRENT OUTPUT 1 → CONFIGURATION
20
0
0
mA
4
Q
➀➁
t
a
b
Q
0
+
+
➀
➁
t
mA
t
mA
S=A
S
A