Metrohm 730 Sample Changer - Manuel (Page 101)

4.4 Changer Commands
730 Sample Changer, Detailed Description 98
"ready" signifies a static "ready" line of an external Metrohm in-
strument. "end" stands for pulse signals, for example EOD (=end
of determination). When scanning for pulse signals parallel scan-
ning of several lines cannot be applied.
Setting special bit patterns allows flexible control of connected in-
struments.
Here the following is valid: 0 = line inactive
1 = line active
∗ = arbitrary line state
Example: 00000001 = input 0 is active = instrument 1 "ready"
The bit pattern (= line state ) can be taken over interactively with
the LEARN function. See page 50.
Note:
If the PC software "WORKCELL" is used, the end of titration must
always be scanned with "end1".
Details about the remote interface are found on page 119ff.
1
SCAN >sample sequence
8 SCN:RS
RS
Clear value: ∗ R"
14 ASCII characters
Scanning the RS232 inter-
face
= scan for "ready" status message
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 compa-
red character by character.
Be sure that the interface parameters agree with those of the in-
strument connected (see Configuration Menu '>RS232 settings',
page 86).
Any letters, numbers and special characters from the character set
of the sample changer can be chosen.
The asterisk (
∗ ) may be used as a wildcard for an arbitrary cha-
racter or character string. (If ' ∗ ' is to be interpreted as an ASCII
character, ' ∗∗ ' has to be set.) A wildcard may be used in any posi-
tion of a character string. If the first part of character string is cor-
rectly identified, the first appearance of the character following the
asterisk (
∗ ) is scanned. When it is found, the next part of the cha-
racter string is compared.