Tally T5023+ Programming Manual page 237

Additional commands (Printer)
Function:
The command CSI n ! t triggers the initiation of an acknowledgement signal to
the computer interface if all the jobs transferred up to this command have been
processed.
For a definite assigning of the acknowledgement signals (also CSI n ! t) to the
transferred requests, the acknowledgement message contains the same para-
meter value n that the application transferred in the request.
– If possible, the command CSI n ! t should be avoided in a transac-
i
tion as the use of this command can negatively influence the per-
formance of applications. When using CSI n ! t, the following notes
are important.
– The request for acknowledgements via CSI n ! t should only occur
at the end of a line or during a function switch-over (for example,
from printing to reading MSR). This corresponds to the printer se-
quencing and does not interfere unnecessarily with the perfor-
mance of the document printer.
– The optimal printing path (bidirectional printing) is interrupted by
means of this command.
– The order of the acknowledgement messages from the document
printer is the same as the order of the acknowledgement requests.
– If an application is working with these acknowledgement cycles, it
should not wait for the respective acknowledgement signal, but im-
mediately transmit further print data. Subsequently, the response
can be evaluated..
T5023/5023+ - Programming Guide
Status and error messages
227