Endress+Hauser Proline Promass 83 - Transducer Block

Device Functions Proline Promass 83 MODBUS RS485 9 Block BASIC FUNCTION
Endress+Hauser 109
9.2 Group PROCESS PARAMETER
9.2.1 Function group CONFIGURATION
BASIC FUNCTION G → MODBUS RS485 GDA
→
PROCESS PARAMETER GIA → CONFIGURATION 640
Function description
BASIC FUNCTION → PROCESS PARAMETER → CONFIGURATION
ASSIGN LOW
FLOW CUT OFF
MODBUS register:
Data type:
Access:
6400
5101
Integer
read/write
Use this function to assign the switch point for low flow cut off rate suppression.
Options:
0 = OFF
1 = MASS FLOW
2 = VOLUME FLOW
3 = CORRECTED VOLUME FLOW
Factory setting: MASS FLOW
ON-VALUE LOW
FLOW CUT OFF
MODBUS register:
Data type:
Access:
6402
5138
Float
read/write
Use this function to assign a value to the switch-on point for low flow cut off.
Low flow cut off is active if the value entered is not equal to 0. The sign of the
flow value is highlighted on the display to indicate that low flow cut off is active.
User input: 5-digit floating-point number [unit]
Factory setting: Depends on nominal diameter
! Note!
The appropriate unit is taken from the function group SYSTEM UNITS
(see Page 15).
OFF-VALUE LOW
FLOW CUT OFF
MODBUS register:
Data type:
Access:
6403
5104
Float
read/write
Enter the off-value (b) of the 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%
A0003882
Fig. 34 : Example for low flow cut off on-value and off-value
m =On-value
n = Off-value
a Low flow cut off is switched on
b Low flow cut off is switched off (a + a
⋅ H)
H Hysteresis: 0 to 100%
■ Low flow cut off active
QFlow
t
H
Q
m
n
b
a