Endress+Hauser Liquisys M CPM253 User Manual

Liquisys M CPM223/253 Diagnostics and troubleshooting
Endress+Hauser 85
No functions from Plus
Package 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: enter code
supplied by E+H.
– Following replacement of a defective
module LSCH/LSCP: first enter device
serial number (see nameplate) by
hand, then enter existing code
number.
For a detailed description, see "Replacing
central module" section.
No HART or PROFIBUS
communication
Several devices at the same address
Check addresses and re-enter if
necessary.
No communication possible for several
devices of the same address.
No HART communication
No HART central module
Check using nameplate:
HART = -xxx5xx and -xxx6xx
Retrofit to LSCH-H1 / -H2.
Current output < 4 mA
For further information, see BA00208C/
07/EN, "HART field communication with
Liquisys M CxM223/253”.
No or incorrect DD (device
description)
HART interface missing
Device not registered in HART server
Load too small (must be > 230 )
HART receiver (e.g. B. FXA195) 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
No PROFIBUS
communication
No PA/DP central module
Check using nameplate:
PA = -xxx3xx /DP = xxx4xx
Retrofit to LSCP module,
see "Spare parts" section.
Incorrect device software version
(without PROFIBUS)
Address setting up to 126 in field I1
possible?
Incorrect terminals for PROFIBUS DP
Connection of PROFIBUS DP via the relay
assembly, see connection scheme
No or incorrect DD/DTM
For further information, see BA00209C/
07/EN, "PROFIBUS-PA/DP - field
communication with Liquisys M
CxM223/253.
Baudrate for segment coupler
incorrectly set in DPV-1 server
Bus user (master) has wrong address
or address assigned twice
Bus user (slave) has wrong address
Bus line not terminated
Line problems
(too long, cross-section too small,
not screened, screen not grounded,
cores not twisted, not specified PA or
DP cable, distance to supply lines too
short, spurs too long)
Bus voltage too low
(Bus voltage typ. 24 V DC for non-
Ex)
The voltage at the device PA/DP
connection must be at least 9 V.
Errors Possible cause Tests and/or remedial measures Tools, spare parts

Endress+Hauser Liquisys M CPM253 Specifications

General

Brand	Endress+Hauser
Model	Liquisys M CPM253
Category	Transmitter
Language	English