Red Lion LEGEND - Manual (Page 34)

RS485 SERIAL COMMUNICATIONS
RS485 communications allows for transmitting and receiving of data over a
single pair of wires. This standard feature can be used for monitoring various
values, resetting output(s), and changing values, all from a remote location.
Typical devices that are connected to a Legend unit are a printer, a terminal, a
programmable controller, or a host computer.
The RS485 differential (balanced) design has good noise immunity and
allows for communication distances of up to 4000 feet. Up to 32 units to be
connected on a pair of wires and a common. The unit’s address can be
programmed from 00 to 99. An Optional RLC Serial Converter Module (RS422
to 20 mA current loop) can be installed to expand the unit’s flexibility.
PROGRAMMING SOFTWARE
Software for IBM ® compatible PCs is available to program all of the Legend
configuration parameters such as User Inputs, count modes, etc. The software
allows unit configurations to be created, uploaded, downloaded, and saved to a
file for rapid programming of the Legend. Before using the programming
software, the Legend unit should be powered up and the version number
recorded. This information is needed to take full advantage of the programming
software capabilities.
Note: While using the Legend Programming Software, the Legend unit should
NOT be controlling a process. If the unit is connected while uploading or
downloading the configuration files, unit operation will be interrupted and
counts will be missed.
MINIMUM REQUIREMENTS:
IBM ® compatible 286 or better
Minimum of 450 K FREE conventional memory
MSDOS™ 3.3 or later
RS232 or RS485 serial port with ID of COM1 or COM2
Video TEXT mode of 80 columns x 25 rows
Mouse supported
INSTALLING SOFTWARE
A backup copy should be made of the program disk. The program may be run
using the floppy drive, or it may be installed to a hard drive. To install on the hard
drive, copy all files from the program disk to the desired directory on the hard drive.
Refer to the “SERIAL CONNECTIONS” section of the manual for
connecting the Legend unit to a computer.
USING SOFTWARE
To start the Legend Programming Software (SFLGP) switch to the
disk/directory that contains the software. Type SFLGP and press ENTER. The
software will display an opening screen that displays the current version of the
Legend Programming Software. Press ENTER to proceed to the main editing
screen. The screen is divided into four areas. The top of the screen contains a
pull-down menu that allows actions such as uploading and downloading of a file.
The bottom of the screen displays an alternate method of accessing the pull-down
menu selections by using the F1-F8 keys in combination with the ALT key. The
middle section displays the programming parameters of the current file and
model of Legend. Below the pull-down menu is the file status information that
indicates the current file name, model and available message/mnemonic memory
available. Multiple pages are used to display all of the programming parameters.
To change the page displayed press PGUP/PGDN or use the mouse to click on
the arrows located at the upper and lower right of the screen.
Uploading/Downloading of files from the Legend requires that the baud rate
and unit address of both the Legend and the SFLGP be identical. Prior to
performing either an upload or download, a menu of the current PC
communications settings will be displayed. These settings may be modified
before proceeding with the intended action. Once the action is started, the
Legend will display “TX’ING PROGRAM” if uploading or “RX’ING
PROGRAM” if downloading. Uploading is file transfer from the Legend to the
PC and downloading is file transfer from the PC to the Legend.
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