4
General operation of the parallel interface
To print a message from the library, it is necessary:
• To present the message number to printer on the Parallel Interface (D0-D7) of the
head concerned.
• To activate the DTOP signal, which:
– memorizes the message number,
– activates the print start-up.
The BUSY signal is activated at the start of printing. It becomes inactive at the end of the
printing cycle.
A printing cycle consists of:
• a print of the message,
• phase recognition.
When the Parallel Interface is used in AUTO mode, the BUSY operates as described above for
each message printed.
It can therefore be used to alter the message itself in this start mode.
If the printer receives a DTOP without the external inputs being activated, the last selected
message is to be printed.
If the printer receives an invalid message number the last selected message is to be printed.
A message number should be from 1 to the end of the library.
Any message beyond the size of the library is invalid.
5
Restriction of the parallel interface operation
The option "Non double printing" is not available with the option "Message selection".
The use of postdate 2 is incompatible with the use of a parallel interface option.
Parallel link - Selection of messages
A13862 Version E
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