Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 21)

Chapter 2
Introduction to the DL40
2 – 8
Data Mode Selection
When using the DL40 message display, you can select from two data modes
•
binary
•
Binary Coded Decimal (BCD) either signed or unsigned
Within any application, triggers and variable data can be in either form. For
example, message triggers can be in a binary format, while variable data can
be BCD.
Message Chaining
The DL40 allows you to create a chain of messages for display in sequence.
Only the first event in the chain need be triggered from outside. Then each
message in the chain can trigger the next until the complete sequence has
run.
Adjustable Parameters for Serial Communications
With the DL40 you can configure RS-232 or RS-485 port parameters as
needed for compatibility with printers, data recorders, slave displays, or
control computers. Configurable parameters include:
•
Baud Rate. Available baud rates include:
300 4800
1200 9600
2400 19200
•
Parity. You can transmit data with:
Odd parity
Even parity
No parity
•
Handshake. You can choose from:
Software
Hardware
None
•
Data Bits per Character. Either 7 or 8
•
Null Count. From 0 to 255. This setting allows you to send a string of
nulls to the printer between characters. It is useful with slower printers
that drop characters because they can’t keep up with normal DL40 output.
•
Page Width. Between 20 and 132 characters