Endress+Hauser Proline Promass 83 - Important functions and parameters of the Transducer Blocks

Device Functions Proline Promass 83 MODBUS RS485 9 Block BASIC FUNCTION
Endress+Hauser 111
9.2.2 Function group EPD PARAMETER
BASIC FUNCTION G → MODBUS RS485 GDA
→
PROCESS PARAMETER GIA → CONFIGURATION 640
→
EPD PARAMETER 642
Function description
BASIC FUNCTION → PROCESS PARAMETER → EPD PARAMETER
EMPTY PIPE
DETECTION
MODBUS register:
Data type:
Access:
6420
5106
Integer
read/write
Use this function to activate the empty pipe detection (EPD). With empty
measuring tubes the density of the fluid falls below the value specified in the
function EPD VALUE LOW.
Options:
0 = OFF
1 = ON
Factory setting:
Liquid: ON
Gas: OFF
" Caution!
• Select a correspondingly low EPD response value in the function EPD VALUE
LOW, so that the difference to the effective density of the fluid is sufficiently
large enough. This ensures that totally empty measuring tubes and not partially
filled ones are detected.
• For gas measurement we strongly recommend to switch off empty pipe
detection.
EPD VALUE LOW
MODBUS register:
Data type:
Access:
6423
5110
Float
read/write
! Note!
Function is not available unless the ON selection was selected in the EMPTY PIPE
DETECTION function.
Use this function to set a lower threshold for the measured density value, in order
to detect possible problems in the process indicated by too low density.
User input: 5-digit floating-point number
Factory setting: 0.2000 g/cc
EPD VALUE HIGH
MODBUS register:
Data type:
Access:
6424
5112
Float
read/write
! Note!
Function is not available unless the ON selection was selected in the EMPTY PIPE
DETECTION function.
Use this function to set an upper threshold for the measured density value.
User input: 5-digit floating-point number
Factory setting: 6.0000 g/cc
EPD RESPONSE
TIME
MODBUS register:
Data type:
Access:
6425
5108
Float
read/write
Use this function to enter the time span for which the criteria for an empty pipe
have to be satisfied without interruption before a notice message or fault message
is generated.
User input: fixed-point number: 1.0 to 60 s
Factory setting: 1.0 s