Rockwell Automation 2706-DXX Dataliner Message Display DL5 Series - Manual (Page 81)

2706-UM001A-US-P
Chapter
10
Using the DL5 Parallel Port to Replace Pilot
Lights
Chapter Objectives This chapter shows you how to replace up to 16 pilot lights with a single
DL5. Descriptions of both the priority and round robin operating modes are
provided.
Description of Input Modes The DL5 has 2 modes of operation which allow you to replace pilot lights:
•
Round Robin input mode - while in the round robin mode of operation,
the DL5 will look at the sixteen data lines as individual inputs. Each of
the inputs is like the input wire to an individual pilot light. When a data
line to the DL5 is triggered, a message corresponding to that data line is
displayed.
•
Priority input mode - the priority input mode is similar to the round
robin input mode except that each of the data lines is assigned a priority
in relation to the other data lines.
Note: These pilot light operating modes do not support variable data within
a message.
Pilot lights are typically used in one of two ways:
1. Pilot lights can be used as status indicators. For example, a pilot light
can inform an operator that a motor is on or off.
2. Pilot lights can also be used as diagnostic indicators. For example, a
pilot light can inform an operator that an overload relay is tripped.