Red Lion LEGEND - Manual (Page 8)

GENERAL DESCRIPTION (Cont’d)
This capability allows displays such as; ‘1000 RPM’, ‘99999 Ft’, ‘PRC
9999’, etc.
The Legend Plus also features messaging capabilities that can inform the
user of output actions or other events that occur in a system. Up to ten
messages can be programmed. Messages can be requested by an output status
change, User Input(s), or through serial communications. The messages can be
programmed for block or character scroll, to blink, time out, and to alternately
flash between message and indication display. On dual color models the
message can be programmed to be displayed in either color. This capability is
very useful in drawing the operator’s attention to particular messages.
The program disable DIP switch, a code value, and an external User Input
selected for Program Disable can be utilized to provide multi-level protection
against unwanted changes to data values and unit configuration.
The Legend Plus features enhanced serial communications. The Serial port
can be configured for connection to RS485 or RS232 devices. It can be used
for data retrieval and for programming various data values.
Optional Legend Plus Programming software (SFLGP) for IBM®
compatible PCs is available to program all the Legend Configuration
parameters, such as, messages, count modes, etc. The software allows unit
configurations to be created, uploaded, down-loaded, and saved to a file for
rapid programming of the Legend unit.
The six Programmable User Inputs can be configured to provide a variety
of functions. Four User Inputs are located on the upper rear terminal block.
The other two inputs are front panel function keys.
The User Inputs can be configured to provide functions such as:
Count Inhibit Reset
Message Request Counter Load
Message Cancellation Output Activation
View/Freeze Display Output Deactivation
Change Display Skip Presets (outputs)
Program Disable Print Request
The LGPM offers a choice of seven programmable counting modes for use
in applications requiring bidirectional, Anti-coincidence, and Quadrature
counting. The count inhibit function can be utilized with all of these input
response modes by programming User Input 4 for the Inhibit Count function.
Input A accepts a signal for the Count and Rate displays. Input B accepts a
signal for the Count display or direction control. In the Anti-coincidence
mode, both inputs are monitored simultaneously, so that no counts are missed,
and the final count can be chosen as the sum or difference of the two inputs.
Rate and Count displays have separate scaling and decimal point
placement, for readouts in different units. The Counter Load feature enables
the operator to modify the count value. This is useful when flawed material
has been counted and it is necessary to adjust the count value accordingly.
The rate operates in the time interval method (1/tau) to calculate the rate
value. This method insures high resolution at all input rates. Averaging can be
accomplished by programming the Minimum and Maximum Update Time for
the desired response. Extensive scaling capabilities allow practically any
reading at very slow input rates.
The construction of the LGPM unit is a lightweight, high impact plastic
case with a clear viewing window. The sealed front panel with the silicone
rubber keypad meets NEMA 4X/IP65 specifications for wash-down and/or
dusty environments, when properly installed. Plug-in style terminal blocks
simplify installation and wiring changes.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in
the manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
Do not use this unit to directly command motors, valves, or other actuators
not equipped with safeguards. To do so, can be potentially harmful to persons
or equipment in the event of a fault to the unit.
-6-