Endress+Hauser RIA15 - HART Diagnostic Messages; Other Diagnostics in the HART Mode

Troubleshooting RIA15
42 Endress+Hauser
Diagnostic
number
Short text Corrective measure Status signal Diagnostic
behavior
Priority
F960 HART®
communication (slave
not responding)
• Verify HART slave address
• Check electrical wiring (HART®)
• Check HART® function sensor/actor
F Alarm 8
C970 Multi-master collision • Check additional master in the HART® network
(e.g. handheld).
• Check master setting (secondary/primary)
C Check 9
F911 HART® slave device
error (HART® Field
Device Status)
Check sensor/actor configuration or check for defects F Alarm 10
S913 HART® slave current
output saturated
(HART® Field Device
Status)
• Commissioning: Check sensor/actor for incorrect
configuration, check sensor/actor configuration
• Operation: Process parameter outside valid range
S Warning 11
S915 HART® slave variable
outside limits of range
(HART® Field Device
Status)
S Warning 12
9.2.2 Other diagnostics in the HART® mode
The process display unit has an integrated HART® diagnostics function. This function can
be used to estimate the HART® signal level, the applicable communication resistance, and
the noise of the network.
The display unit can measure and display the following values:
Parameters Description Display
Tx mV Process display unit signal level mV Peak-to-peak level of the
transmission signal
Rx mV Slave signal level mV Peak-to-peak level of the received
signal
NOISE Weighting of the interference
signal
LO / MED / HI Categorization of the interference
into low, medium or high
Rc Ω Effective communication resistance Ω Resistance in Ohm
The values can be called up in the EXPRT – DIAG – HLEVL menu.
Measuring the transmission signal level "Tx":
The Tx measurement can be used to assess the signal level of the transmission signal.
Ideally this should be between 200 mV and 800 mV . The following values are displayed:
Tx < 120 mV 120 to 200 mV 200 to 800 mV 800 to 850 mV > 850 mV
Display LO Level in mV HI
Bargraph < < 0 to 100 % > >
Measuring the received signal level "Rx":
The Rx measurement can be used to assess the signal level of the received signal. Ideally
this should be between 200 mV and 800 mV .
The Rx signal value that is displayed is a filtered signal level as assessed by the process
display unit. In this way, the value measured externally and the displayed value can differ
from one another, for example in the case of a trapezoidal received signal.