Communications Checks

Table 7-30

 

Communications Checks

 

 

 

 

 

 

Checks

Action

 

 

 

 

Is your computer configured to the

These parameters are required to

parameters described in the

communicate with the printer. Verify your

configuration instructions?

computer’s communications port

 

 

 

configuration matches these parameters.

 

 

 

Note: If these parameters are not set

 

 

 

properly, they may yield a 40,20, or

 

 

 

22 ERROR on the printer’s Control Panel.

 

 

 

 

For Serial Communications only

 

 

 

 

 

 

Does the printer’s baud rate match that

Run the printer’s Self Test to verify the

of the computer’s communications port?

baud rate setting. At the computer, verify

 

 

 

that the baud rate is set correctly in any

 

 

 

configuration files.

 

 

 

Note: A baud rate problem may cause a

 

 

 

40 ERROR.

 

 

 

Are you using the correct cable Seefor the cable wiring in Chapter 3.

communications between the computer

and the printer?

Hint: On an RS-232 cable, pins 2 and 3

 

 

 

may need to be reversed at the

 

 

 

printer-end of the cable.

Are you using the correct RS-232During-C the communicatio“handshake,”

protocol?the printer transmits both the XON/XOFF signal, and the DTR signal. The DTR (Data Terminal Ready) signal may be either negative going, or positive going.

DTR polarity is set at the printer’s Control Panel. The XON may be set to normal (only transmitted when data is needed), or Robust XON (transmitted every second). This feature is configurable from the Control Panel. DTR is available at pin 20, and XOFF is transmitted from pin 2 of the printer.

7-54 Troubleshooting