Technical data

Chapter 9: Appendices
Appendix 1: Serial Interface Reference
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9 Appendices
Appendix 1: Serial
Interface Reference
Two serial ports are standard on the JAGXTREME industrial terminal Controller PCB. They
are designated COM1 and COM2.
• COM1 provides both RS-232 and 20 mA current loop interfaces. Both types of
interfaces can be output simultaneously; however, only one input can be
connected.
• COM2 provides either RS-232, RS-422 or RS-485 interfaces. Both RS-232 and RS-
422 can be output simultaneously; however, only one input can be connected. If
RS-485 is selected for COM2, it is the only type of interface that can be used. COM2
is also used for DigiTOL scale interface. If a DigiTOL scale is connected to COM2,
that port cannot be used for any other purpose.
Two additional serial ports (COM3 and COM4) are available on optional Multifunction
PCB. COM3 has the same functionality as COM1 but COM 3 does not have 20mA;
COM4 has the same functionality as COM2.
Character framing is programmable in the setup mode. Framing can be:
1 start bit
7 or 8 ASCII data bits (selectable)
0 or 1 parity bit (even, odd, or none)
1 stop bit
You can also configure the baud rate (from 300 to 115.2k baud) and checksum
character interface parameters.
The JAGXTREME terminal uses software handshaking to control data flow commonly
referred to as XON/XOFF handshaking. When a receiving device (typically a printer) is
getting information from a JAGXTREME terminal and cannot receive any more in its
buffer, it sends an ASCII XOFF (13h) telling the JAGXTREME terminal to temporarily stop
sending data until its buffer clears.
When the device can receive more data, it sends an ASCII XON (11h) telling the
JAGXTREME terminal to begin sending data again. This process can occur as often as
required by receiving device.
The XON/XOFF method is the only type of handshaking supported by the JAGXTREME
terminal at this time.