Metrohm 788 IC Filtration Sample Processor - Manual (Page 90)

4 Operation
788 IC Filtration Sample Processor
82
Predefined bit patterns are supported which can be selected by short
names (e.g. 'Ready1' or 'End2' ).
'Ready' signifies a static "ready" line of an external instrument. 'End'
stands for pulse signals, for example EOD (= end of determination).
When scanning for pulse signals parallel scanning of several lines can-
not be applied.
Setting special bit patterns allows flexible control of connected instru-
ments.
Here the following is valid:
0 = line inactive
1 = line active
= arbitrary line state
Example: 00000001 = input line 0 is active = instrument 1 "ready"
The bit pattern (= line state) can be taken over interactively with the
LEARN function (see section 4.3.4).
For details about the remote interface, see section 5.1.
1
SCAN
>sample sequence
6 SCN:RS
Rm,RS
14 ASCII characters
Scanning the RS232 interface
arbitrary series of 14 characters
In a sequence the SCN:RS command causes method processing to stop
until the predefined character string (up to 14 characters) is received via
serial RS232 interface. The received data is compared character by
character.
Be sure that the interface parameters agree with those of the instrument
connected (see Configuration menu '>RS232 settings , section 4.2.1).
Any letters, numbers and special characters from the character set of
the IC Filtration Sample Processor can be chosen. The asterisk '*' may
be used as a wildcard for an arbitrary character or character string. (If
'*' is to be interpreted as an ASCII character, '**' has to be set). A
wildcard may be used in any position of a character string. If the first
part of character string is correctly identified, the first appearance of the
character following the asterisk '*' is scanned. When it is found, the
next part of the character string is compared.
This function is especially suited to instruments with Metrohm remote
control language. Here the autoinfo status messages can be scanned.
For example, the 732 IC Detector has the following possibilities for
scanning autoinfo information:
*R"* Ready, "Ready" state reached, e.g. at program end
*S"* Stop, instrument manually stopped
*W"* Instrument in wait status
*E"* Error, error message
These status messages, however, are only transmitted if the corre-
sponding status message has been previously switched on, for exam-
ple, in the the start sequence (e.g. for the "Ready" message of the 732
IC Detector 732 with the command 'CTL:RS &Set.A.R"on"' ).