Red Lion LEGEND - Manual (Page 6)

GENERAL DESCRIPTION
The Legend unit (LGD) is a two input,
microprocessor-based device that offers the
features and performance of a dual level
p r e s e t C o u n t e r a n d t i me i n t e r v a l R a t e
indicator. The internal count precision is
maintained to 9 digits.
The RS485 serial communication port
provides for computer and printer interface
that extends the capabilities of the unit. It can
b e u s e d f o r d a t a r e t r i e v a l a n d f o r
programming various data values.
Optional Legend Programming Software
( S F L G P ) f o r I B M ® c o mp a t i b l e P C s i s
a v a i l a b l e t o p ro g ra m a l l o f t h e Leg e n d
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 unit.
Application flexibility is provided through
the two-line by eight-character alphanumeric
d i s p l a y . T h e d i s p l a y f e a t u r e s E n g l i s h
l a n g u a g e me n u s f o r e a s y v i e w i n g a n d
s i mp l i f i e d
p r o g r a mmi n g . T h e f o u r
scroll-through indication displays can be
programmed to show various parameters and
to automatically scroll, if desired. A program
disable DIP switch used with an external
User Input can be utilized to protect the
settings and guarantee that no unwanted
changes occur during operation.
The five Programmable User Inputs can be
set for a variety of functions. Three user inputs are located on the upper rear
terminal block and the other two inputs are front panel function keys.
When power is turned off, the unit automatically saves the settings and data
in its no-power memory. When power is restored, the LGD restores the
parameters it had at power down. The EPROM’s life expectancy is at least
100,000 power cycles.
The LGD offers a choice of seven programmable counting modes for use in
applications requiring Bi-directional, Anti-coincidence, and Quadrature
counting. A separate Inhibit terminal can be used for any of the count modes.
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BLOCK DIAGRAM