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Appendix C— Communications Reference Cd 39 Helvetica CondensedHelvetica
90 EasyCoder 3400e Bar Code Label Printer User’s Manual
Host Requirements
Your printer has the following hardware and software requirements:
• The host computer must use the American Standard Code for
Information Exchange (ASCII) for data communications.
• A serial port must be available on the host if you are connecting directly
to the printer.
• The host must support at least one of the following data
communications interfaces: RS-232, RS-422, or RS-485.
For information on configuring the host computer, port concentrator, or
network controller, see the reference manual for the controlling device.
Communications Boundaries
The information below applies to all protocols that the printer supports.
Communications Boundaries
Parameter Maximum Capacity
Message delay 9999 milliseconds
Character delay 9999 milliseconds
Message block size 255 characters (including STX and ETX characters)
Unlimited block size for XON/XOFF
Device address number
(Multi-Drop only)
A to Z, 0 to 5
Communications Interfaces
The printer supports serial communications with the following interfaces:
• RS-232
• RS-422
• RS-485
The following sections describe these interfaces. See the Data
Communications Reference Manual (P/N 044737) for more detailed
information.
RS-232 Serial Interface
Use the RS-232 serial interface in all asynchronous point-to-point full- or
half-duplex direct data communications or modem control. The printer
cable must have the pin assignments for an RS-232 serial interface shown
in the next table.