5.4 - Service software
104
TCT-2301 Service instructions
M2007/3en
©BTG 2004
5.4.3
Software Fault feedback SPC-1000
The SPC communicates with the instrument using HART protocol. The
SPC and has a Master-Slave relation with the instrument, where the SPC
is
Master
(secondary master) and the instrument is
Slave
.
Error messages showing in the SPC start with
Cmd *
, where * represents
the command that caused the error.
The following error messages can occur:
Error message
Probable cause
Solution
Comm line busy
The line is occupied by another
master. SPC tries five times to
find a time gap that is sufficient-
ly long.
This must not happen and
depends on the other mas-
ter not following the HART
standard. Disconnect or
shut off the other transmit-
ting master.
Not from slave
Response comes from another
master, not from the instru-
ment.
Disconnect all HART units
except the one you want to
communicate with – some
terminals behave improper-
ly.
Comm error
Communication error/parity er-
ror.
Can be due to surrounding
heavy disturbances or poor
cables. Should the error re-
main, check all connec-
tions.
Wrong slave ID
Response from slave other
than the one the SPC sent
message to.
Normally this error does not
occur since there should be
only one slave.
Disconnect the other
slaves.
Wrong reply cmd
Erroneous reply to a command,
the instrument answers to a
question other than the one put
out by SPC.
Probably other units on the
cable are the cause of the
communication distur-
bance. Try to disconnect
them.
Cmd resp error
Error in the protocol between
SPC and the instrument,
making it difficult for the instru-
ment to understand SPC prop-
erly.
Update the software in SPC
or the instrument so that
they can understand each
other.
Data length err
The command is not the cor-
rect length, it is too short.
Update the software in SPC
or the instrument so that
they can understand each
other.
Invalid message
Errors in the message part,
corresponding to check sum
below.
Probably faulty cables
between instrument and
SPC.
Invalid chksum
Wrong check sum on parcel
(normally results in re-send-
ing).
Probably faulty cables
between instrument and
SPC.