Endress+Hauser Liquisys M COM 223 F, Operating Instructions Manual, Page: 56 / 82

Error Possible cause Remedy Equipment needed, spare parts
Plus packet functions
not available
– Plus packet not enabled (enable
with code that depends on serial
number and is received from
E+H with order of Plus packet)
– Plus packet upgrade:
code received from E+H
⇒
enter
– Following replacement of
defective LSCH/LSCP module:
First enter instrument serial
number (see nameplate)
manually, then enter code
number
Detailed description
see Chap. 8.5.5
No HART
communication
– No central HART module Verify by looking at nameplate:
HART = -xxx5xx and -xxx6xx Upgrade to LSCH-H1 / -H2
– No or wrong DD
(device description)
For further information see Chap.
Additional Operating Instructions
BA 208C, »HART
®
– Field
communication with Liquisys
M M CxM 223 F / 253 F«
– HART interface missing
– Instrument not registered with
HART server
– Load < 230
Ω
– HART receiver (e. g. FXA 191)
not connected via load
– Incorrect instrument address
(Addr. =0 for single mode,
Addr. > 0 for multidrop mode)
– Line capacitance too high
– Line interference
No PROFIBUS
®
communication
– No central PA module Verify by looking at nameplate:
PROFIBUS-PA = -xxx3xx
PROFIBUS-DP = xxx4xx Upgrade to LSCP module
– Incorrect software version
(without PROFIBUS)
For further information see
additional Operating Instructions
BA 209C, »PROFIBUS-PA/-DP –
Field communication with Liquisys
M M CxM 223 F / 253 F«
– Commuwin (CW) II:
CW II version and instrument
SW version incompatible
– No or wrong DD/DLL
– Incorrect baud rate setting for
segment coupler in DPV-1 server
– Incorrect station (master)
address or duplicate address
– Incorrect station (slave)
address
– Bus line not terminated
– Line problems
(too long, cross section too
small;
not screened, screen not
grounded, wires not twisted)
– Bus voltage too low
(bus supply voltage
typ. 24 V DC for non-Ex,
13.5 V DC for Ex)
The voltage at the PA/DP
connection of the instrument must
be at least 9 V.
No communication
HART or PROFIBUS – Several instruments on the same
address
Check addresses and reset if
necessary
Maintenance and troubleshooting Liquisys M COM 223 F / 253 F
54 Hauser