Endress+Hauser Liquisys M CCM223 - Page 92

Diagnostics and troubleshooting Liquisys M CCM223/253
92 Endress+Hauser
Error Possible cause Tests/remedial action Tools, spare parts
Total load in the current
loop too high (> 500 Ω)
Disconnect output and measure
directly at device
mA meter for 0–20 mA DC
EMC (interference
coupling)
Disconnect both output cables
and measure directly at device
Use shielded cables, ground
shields at both ends, where
necessary route cable in
another cable duct
Current output
table is not
accepted
Value interval too small Select practical intervals
No output signal
for temperature or
pH/mV
Device does not have a
second current output
Check version using nameplate,
if necessary replace the LSCH-
x1 module
LSCH-x2 module, see the
"Spare parts" section
Device with PROFIBUS-PA PA device has no current
output!
Chemoclean
function not
available
No relay module (LSR1-x)
installed or only LSR1-2
available
Install LSR1-4 module.
Chemoclean is enabled using
the release code supplied by the
manufacturer in the
Chemoclean retrofit kit.
LSR1-4 module, see the
"Spare parts" section
Plus Package
functions not
available
Plus Package not enabled
(enable by entering a code
which depends on the
serial number and which is
supplied by E+H when a
Plus Package is ordered)
• For Plus Package retrofit:
code is supplied by E+H →
enter this code.
• After replacing a defective
LSCH/LSCP module: first
enter device serial number
manually (see nameplate),
then enter the existing code
number.
For a detailed description,
see the "Replacement of
central module" section.
No HART
communication
No HART central module Verify using nameplate: HART =
-xxx5xx and -xxx6xx
Upgrade to LSCH-H1 / -H2
No or incorrect DD (device
description)
For further information, see
BA00208C/07/EN, "HART field
communication with Liquisys
CxM223/253”
HART interface missing
Load too small (must be >
230 Ω)
HART receiver (e.g. FXA
191) not connected via
load but via power supply
Incorrect device address
(addr. = 0 for single
operation, addr. > 0 for
multidrop operation)
Line capacitance too high
Interference on line
Several devices set to same
address
Assign addresses correctly No communication possible
if several devices set to the
same address
No PROFIBUS
communication
No PA/DP central module Verify using the nameplate: PA
= -xxx3xx /DP = xxx4xx
Upgrade to LSCP module,
see the "Spare parts" section
Incorrect device software
version (without
PROFIBUS)
For further information, see
BA00209C/07/EN "PROFIBUS
PA/DP - Field communication
for Liquisys CxM223/253".
Information about
PROFIBUS configuration is
provided in Technical
Information TI00260F,
while detailed information
about instrumentation and
accessories is provided in
Operating Instructions
BA00198F
With Commuwin (CW) II:
CW II version and device
software version
incompatible
No or incorrect DD/DLL