Rockwell Automation 2706-DXX Dataliner Message Display DL5 Series - Manual (Page 87)

2706-UM001A-US-P
Chapter
11
Using the DL5 to Replace BCD Displays and
Lookup Tables
Chapter Objectives This chapter provides instructions on how to replace a 2 or 3-digit BCD
numeric display and any associated lookup tables with a single DL5.
Replacing a BCD Fault Code
Display The first step in replacing a BCD display is to determine if your DL5 has
enough memory to store all of the BCD codes. Typically a BCD display is
used in conjunction with a lookup table. If a code is displayed on the BCD
display, an operator will refer to a lookup table to determine the meaning of
the code. If you are going to replace a BCD display and lookup table with a
DL5 you must make sure that the DL5 can store the meanings of all the
codes listed in the BCD lookup table. The DL5 can store 94 or 387 message
blocks depending on memory size (2K or 8K).
Note: Memory capacity is given in the number of message blocks that are
available. Some of the messages that you enter may require more than one
message block. A message block is one line of 16 characters.
After you have determined that the DL5 has sufficient capacity to store the
messages, perform the following steps:
1. You must set the DL5 to accept positive logic. If positive logic is
selected, voltage on a data line will represent an ON condition.
2. Set the DL5 to accept BCD input as described in Chapter 8.
3. Place the DL5 in the edit mode and program messages for the message
numbers that were previously displayed on the BCD display.
4. Tie strobe line D15 high to indicate message numbers by wiring it to a
5-24 VDC source.
5. Place the DL5 in the run mode.