Dascom 7010 Programmers Manual DMX Manuale Utente Scaricare il pdf (Pagina 137)

135

3 DTR protocol

(a) Conditions for making DTR signal Ready (High)

The following must be required:

･ Printer is on line.

･ Receive buffer has more than 1K bytes available.

Note: When receive buffer has less than 128 bytes available,

DTR signal becomes “Busy (Low)” level and this “Busy (Low)

level is kept until receive buffer has at least 1 K bytes

available.

(b) Conditions for making DTR signal BUSY (Low)

･ Printer is in error.

･ Receive buffer has less than 128 bytes available.

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Dascom 7010 Programmers Manual DMX Manuale Utente Pagina 137