Endress+Hauser RIA15 - Error Messages via HART Response Codes

RIA15 Troubleshooting
Endress+Hauser 43
The following values are displayed:
Rx < 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 "NOISE" interference signal:
When the interference signal level is measured, the interference signal determined is
divided into three categories:
LO = low
MED = medium
HIGH = high
The noise measurement is also a filtered signal level as assessed by the process display
unit. The value measured externally and the displayed value can therefore differ from one
another, depending on the frequency and the form of the signal.
With low wanted signal levels (Rx, Tx), transmission errors can occur even if the
interference signal level is low ("LO" displayed).
Measuring the communication resistance "Rc":
The "Rc" measurement can be used to determine the network resistance of the HART®
network. Ideally this should be between 230 Ω and 600 Ω .
The network resistance is the sum of the HART® communication resistance, the
device's input resistance, the transmission line resistance and line capacitance.
The following values are displayed:
Rc < 100 Ω 100 to 230 Ω 230 to 600 Ω 600 to 1 000 Ω > 1 000 Ω
Display LO Resistance in Ω HI
Bargraph < < 0 to 100 % > >
9.2.3 Error messages via HART® response codes
The transmitter responds with a response code for HART® commands #194 and #195. If
the response code does not equal 0, the process display unit shows the response code
briefly in the format rc xx.
The meaning of the response codes is explained in the following table.
For the response to the Endress+Hauser-specific HART® command #231, see the
"Commissioning" section, "Diagnostics" menu →  36.
Code Class Description Solution
0 Success No command-specific
error
-
2 Error Invalid selection Check HART® settings and
firmware in the FMR20
3 Error Value too large Check basic settings →  40
4 Error Value too small Check basic settings →  40
5 Error Not enough data bytes
received
Check HART® settings and
firmware in the FMR20
6 Error Device-specific
command error
Check HART® settings and
firmware in the FMR20