Zebra 49834 Manual De Usuario

Serial Data Port

57518L-001 Rev. A

3/18/05

170PAX4 Maintenance Manual

357

To communicate using the serial data port of the print engine, you must choose the number of 
data bits, parity, and handshaking. Parity applies only to data transmitted by the print engine 
because the parity of received data is ignored.

The values selected must be the same as those used by the host equipment connected to the 
print engine. Default print engine settings are 9600 baud, 8 data bits, no parity, and 
XON/XOFF. The print engine will accept any host setting for stop bits.

For all RS-232 input and output signals, the print engine follows both the Electronics 
Industries Association (EIA) RS-232 and the Consultative Committee for International 
Telegraph and Telephone (CCITT) V.24 standard signal level specifications.

When DTR/DSR handshaking is selected, the Data Terminal Ready (DTR) control signal 
output from the print engine controls when the host computer may send data. DTR ACTIVE 
(positive voltage) permits the host to send data. When the print engine places DTR in the 
INACTIVE (negative voltage) state, the host must not send data.

Request to send (RTS) is a control signal from the print engine that is connected to the clear to 
send (CTS) input at the host computer. RTS is always active (positive voltage) when the print 
engine is on.

When XON/XOFF handshaking is selected, data flow is controlled by the ASCII 

Control Codes DC1 (XON) and DC3 (XOFF). The DTR Control lead has no effect.