Extech Instruments 2000i Series User Manual page 9

RS232 Communication Interface - General notes & DIP switch settings
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Eight-position dipswitch, located to one side of the paper roll, is used to select and set the serial
RS232 interface. The printer reads these switches once, on initial power-up. The functions
assigned to each switch are listed in Table 2.
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Proper Baud Rate and protocol settings are required to communicate with a host computer. The
standard factory setting is 19,200 BAUD, 8 DATA BITS, NO PARITY BIT, and one STOP BIT,
all switches in off position.
The Extech Extended XMODEM protocol
The Extech XMODEM software option is designed to overcome the unreliability of data transmission
using direct infrared interface. It is intended for host computers equipped with IrDA compatible physical
interface and no IrDA software Stack.
The Extech XMODEM protocol is supported via RS232 (RS-XMODEM) or IrDA (IR-XMODEM)
interface. The XMODEM option and the communication parameters are set using on board dip switches, as
summarized in the table below.
Communication Interface - S2000i DIP
Dip Switch Function
1 & 2 Baud rate
Standard Baud rate
19,200
9,600
4,800
2,400
3 No. of data bits
7 Data Bits
8 Data bits
4 & 5 Parity bit
Serial RS232 mode
No Parity
Odd Parity
No Parity
Even Parity
6 Hardware Handshaking
Enable
Disable
7 Clock and Calendar
clock set
8 Communication Interface
RS232
IrDA
9
switch settings
TABLE 2 - S2000i DIP switch settings
Special Baud rate
9,600
4,800
2,400
1,200
Alternate mode with SW -8 ON
IrDA
Ir-Xmodem
Ir-Direct
RS232-XMODEM
SW1 SW2
Off Off
On Off
Off On
On On
SW3
on
Off
SW4 SW5
off off
on off
Off 0n
on on
SW6
On
Off
SW7 (OPTIONAL)
On
SW8
Off
On