Endress+Hauser Proline Promag 55 Operating Manual page 83

Device functions Proline Promag 55 FOUNDATION Fieldbus
Endress+Hauser
Write access with
Parameter operating mode
(MODE_BLK)
Low Flow Cut Off - AUTO - OOS
Assign
Low Flow Cut Off - AUTO - OOS
On Value
Low Flow Cut Off - read only
Unit
Low Flow Cut Off - AUTO - OOS
Off Value
"Flow" Transducer Block/base index 1400
Use this parameter to assign the switch point for the low flow cut off.
Options:
OFF
VOLUME FLOW
MASS FLOW
Factory setting:
VOLUME FLOW
Use this function to specify the switch-on point for low flow cut off. Low
flow cut off is active if the value entered is not equal to 0.
User input:
5-digit floating-point number [unit]
Factory setting:
Nominal diameter and country dependent → Page 123 ff.
!
Note!
• When the low flow cut off is triggered, a flow value of "0" is output via
the output value OUT (AI Block). In addition, the status changes to
UNCERTAIN.
• Choice of unit: see "Low Flow Cut Off - Unit" parameter
( → Page 83).
Use this parameter to view the unit for the low flow cut off.
!
Note!
The unit for low flow cut off is determined by means of the "System Unit -
Volume Flow" or "System Unit - Mass Flow" parameter ( → Page 79 ff.).
Use this function to enter the switch-off (b) point for low flow cut off.
Enter the switch-off point as a positive hysteresis (H) from the switch-on
point (a).
User input:
Integer 0 to 100%
Factory setting:
50%
Q
n
m
m = switch-on point, n = switch-off point
a Low flow cut off is switched on
b Low flow cut off is switched off (a + a
H Hysteresis value: 0 to 100%
■
Low flow cut off active
Q Flow
3 Transducer Block
Description
b
H
a
t
⋅
H)
A0003882
83