Metrohm 711 Liquino - Manual (Page 93)

4. Detailed description
711 Liquino, Instructions for use 87
Input lines which are of no interest or for which no defined condi-
tion can be predicted should be masked with an asterisk (*).
With a suitable multiple cable (with special wiring) it is possible to
scan several instruments simultaneously via the remote lines. The
bit patterns for the SCAN command can be combined, i.e. 2 Ti-
trinos can be monitored simultaneously and the end of both de-
terminations can be scanned. Please note that several instru-
ments (Titroprocessors, 691 pH meter) only send short impulses
at the end of a determination (typically 200 ms) and therefore for
these instruments a combined scan of the end of the determina-
tion together with other instruments is only possible under certain
(time-related) conditions.
Details about the remote interface can be found under 'Remote
Control Reference'.
RS232 connection:
When scanning the RS232 connection the input buffer of the inter-
face is monitored. Incoming data are compared with the selected
character string. The lines received must be concluded with the
ASCII characters CR and LF. Incoming data are checked charac-
ter by character.
Any combination of letters, numbers and special characters from
the 711 Liquino character set can be selected. To enter letters and
special characters press <ALPHA> key, see also page 66.
‘*' can be used as place holder for any character strings. (If '*' is
interpreted as an ASCII character then '**' must be used). A place
holder can be set within a character string.
When the first part of the character string has been recognized
correctly then the first appearance of the character which stands
after the '*' is searched for. The comparison of the second part of
the character string is carried out.
This function is particularly suitable for instruments with the
Metrohm remote control language. The AutoInfo status messages
can be scanned. The most useful of these are:
*.T.R" Ready, 'Ready' condition is reached, e.g. after titration
*.T.F" Final, end of determination is reached
*.T.S" Stop, instrument stopped manually
*.T.G" Go, instrument starts
*.E;* Error, error message