CBM-710/720/730/750User ’sMa nual
29 CITIZEN
[4] Othererrors
When trouble is detected in the printer mechanism, the ALARMla mpgoes on, the buzzer is sounded, the
FAULT signal is output, and the DTR signal becomes BUSY. After the ca use of the trouble has been correct ed,
theALARMlampcanbeturnedoffbypressingtheLINEswitchorbymakingRESET="0".Whentheprinter
is put ONLINE, data receivingres tarts.
(4) Data Receiving Contr ol
When the BUSY signal is LOW, your pr inter receives data from the host side, but when this sig nal is HIGH, it
cannot receive data.
(5) Buffering
Data transfer to the input buffer is controlled by the DTR and TD signals. Please refer to 9.3 b) for the DTR
signal and 9.3 f) for the TD signal.