C.3. RS-232C/RS-422A Protocol

C.3. RS-232C/RS-422A Protocol

A protocol is a set of rules the computer follows in sending data to the printer. The RS-232C/RS-422A parameters are stored in battery backed-up memory. They are indicated on the status printout. They can be changed by the FRPO (firmware reprogram) command described in the Programming Manual. The parameters and their identification codes are given below.

H1: Baud rate

Parameter value

Baud rate

 

 

12

1200

 

 

24

2400

 

 

48

4800

 

 

96

9600

 

 

19

19200

 

 

38

38400

 

 

57

57600

 

 

11

115200

 

 

The factory setting is 9600 baud.

H2: Data bits

7 or 8, factory-set to 8.

H3: Stop bits

1 or 2, factory-set to 1.

H4: Parity

Parameter value

Meaning

 

 

0

None

 

 

1

Odd

 

 

2

Even

 

 

3

Ignore

 

 

The factory setting is "None" (0 on the status printout).

H5: Protocol logic

Parameter value

Meaning

 

 

0

Combination of 1 and 3 below

 

 

1

DTR/DSR, positive logic

 

 

2

DTR/DSR, negative logic

 

 

3

XON/XOFF

 

 

4

ETX/ACK

 

 

5

XON/XOFF recognized only as protocol

 

 

The factory setting is 0.

H6: Buffer nearly-full threshold

This is a percentage from 0 to 99. The factory setting is 90.

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