Programming instructions

Intermec Fingerprint 6.13 – Programmer's Guide

7. INPUT TO FINGERPRINT, cont'd.

9. RS 422/485

Communication

Continued!

As an option, some EasyCoder printers can be fitted with an

interface board that provides either RS 422 or RS 485 on "uart2:".

Some models also have a built-in provision for RS 422 on "uart1:"

on the CPU board.

In neither of these protocols, there are any lines for hardware

handshake (RTS/CTS). Thus, in the printer's setup, the option

“RTS/CTS Enable/Disable” for "uart2:" has been replaced by the

option "Prot Addr Enable/Disable”, which is only intended for RS

485, see below.

The strap on the RS 422/485 interface board, that selects 2- or 4 wire

communication, only controls the hardware, but the firmware

cannot read this strap. Instead, 2- or 4-wire communication is

determined by the printer's setup on "uart2:" in regard of “XON/

XOFF, Data from Host, Enable/Disable” and “Prot. Addr. Enable/

Disable”

RS 422

RS 422 is a point-to-point four-line screened cable connection

between a host computer and a printer, or between two printers.

Two lines transmit data and the other two receive data. No hardware

handshake can be used (4 lines only), but XON/XOFF or ENQ/

ACK can be used if so desired.

• RS 422 on "uart1:" (EasyCoder 401/501/601)

Optional driver circuit fitted on CPU board.

Either the standard IN/OUT channel should be set to 1 (default),

or the device "uart1:" should be OPENed for INPUT, e.g.:

OPEN "uart1:" for INPUT AS #1

• RS 422 on "uart2:" (optional RS 422/485 interface board)

Two voltage reference straps and two terminator straps must be

fitted on the interface board.

Set the printer's flowcontrol setup parameters as follows:

RTS/CTS: Always Disable

ENQ/ACK: Enable or Disable

XON/XOFF, Data from host:Always Enable

XON/XOFF, Data to host: Enable or Disable

Prot. addr: Always Disable

Either the standard IN/OUT channel should be set to 2, or the

device "rs485:" should be OPENed for INPUT, e.g.:

OPEN "rs485:" for INPUT AS #1

☞

RS 422/485 Interface

Also see:

• Technical Manual