Computer Interface
4-7
RS-232C Protocol
Parameters of the RS-232C Protocol
A protocol is a set of rules followed by various devices to send or receive data. The parameters of
the RS-232C protocol are stored in the battery-powered memory of the printer. You can verify these
parameters on the status printout as marked by the following identifications:
•H1: Baud rate
• H2: Number of data bits
• H3: Number of stop bits
• H4: Parity
• H5: Protocol logic
• H6: Buffer-nearly-full threshold
• H7: Buffer nearly-empty threshold
• H8: Received data buffer size
The parameters can be changed from the printer operation panel. To change the value for the serial
interface parameters, refer to Changing Serial Interface Parameters on page 2-25.
The following section outlines the parameters and their values you can select on the operation
panel:
H1: Baud rate
The factory setting is 96 (9600 baud).
H2: Number of data bits
7 or 8. The factory setting is 8.
H3: Number of stop bits
1 or 2. The factory setting is 1.
Parameter value Baud rate
12 1200
24 2400
48 4800
96 9600
19 19200
38 38400
57 57600
11 115200
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