PROline Prosonic Flow 93 PROFIBUS-DP/-PA 9 Trouble-shooting
Endress+Hauser 135
9.3 Process errors without messages
Symptoms Rectification
Remark:
You may have to change or correct certain settings in parameters in order to rectify the fault.
The following parameters are described in detail in the “Description of Device Functions” manual.
Flow values are negative,
even though the fluid is
flowing forwards through the
pipe.
1. Check the wiring of the sensor cable
Page 46
If necessary, swap the connections of the terminals “up” and “down”.
2. Change the sign of the flow rate variable:
– PROFIBUS: Manufacturer-specific Transducer Block
Device
matrix CH1/CH2 (V8H1)
– Local display: HOME
BASIC FUNCTIONS SYSTEM
PARAMETER
CONFIGURATION INSTALL DIRECT. SENSOR
Measured value reading
fluctuates even though flow
is steady.
1. Check the fluid for presence of gas bubbles.
2. Increase the following values:
– PROFIBUS (Commuwin II):
Manufacturer-specific Transducer Block
Device matrix
CH1/CH2
FLOW DAMPING (V8H2),
Analog Input function block
RISING TIME (V1H8)
– Local display:
HOME
BASIC FUNCTIONS SYSTEM PARAMETER
CONFIGURATION
FLOW DAMPING
3. Increase the value for the display damping:
– PROFIBUS (Commuwin II):
Manufacturer-specific Transducer Block
Display functions
DISPLAY DAMPING (V3H1)
– Local display:
HOME
USER INTERFACE OPERATION BASIC
CONFIGURATION
DISPLAY DAMPING
Measured value reading
shown on display, even
though the fluid is at a
standstill and the measuring
tube is full.
1. Check the fluid for presence of gas bubbles.
2. Enter a value for the low flow cutoff or increase this value:
– PROFIBUS (Commuwin II): Manufacturer-specific Transducer Block
Device matrix CH1/CH2 ON-VALUE LOW FLOW CUTOFF
(V3H1)
– Local display: BASIC FUNCTIONS
PROCESS PARAMETER
CONFIGURATION
ON VALUE LOW FLOW CUTOFF
The fault cannot be rectified
or some other fault not
described above has
occurred.
In these instances, please
contact your E+H service
organisation.
The following options are available for tackling problems of this nature:
Request the services of an E+H service technician
If you contact our service organisation to have a service technician sent
out, please be ready with the following information:
– Brief description of the fault
– Nameplate data (Page 9 ff.): Order code and serial number
Returning devices to E+H
The procedures on Page 8 must be carried out before you return a
flowmeter requiring repair or calibration to Endress+Hauser.
Always enclose a duly completed “Declaration of Contamination” form
with the flowmeter. You will find a copy of this form at the back of these
Operating Instructions.
Replace transmitter electronics
Components in the measuring electronics defective
Order spare
part
Page 136
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