Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 38)

Chapter 4
The Run Mode – Parallel Port
4 – 3
Insert ASCII Input Data Into a Message
Use the DL40 Keyboard Port to input ASCII data intended for display.
•
A request for ASCII Input Data can be placed in a message by inserting a
[CTRL][X] . See Chapter 5 for more information.
•
Up to l20 ASCII characters can be requested for each message triggered
using Discrete I/O or Block Transfer Write.
•
Requests for ASCII data can be strung together to form inputs up to 20
ASCII characters long.
•
While a message is running, enter the ASCII character or string of ASCII
characters followed by a
[
↵
] .
Return ASCII Input Data to a PLC
Up to 20 ASCII characters are returned via the RS-485 Port.
Put Messages on Historical Events Stack
Both triggered messages and variable data can be put on the 16 Kbyte
Historical Events Stack. The contents of the stack can be viewed on the
DL40 display or printed:
•
in chronological order
•
by number or occurrences
Override Slave Address Selected as a Message Attribute with an
Address Sent with the Message Trigger
To send any message to a slave, Port Use of the RS-485 Port must be set to
DL Slaves . See Chapter 6.
In the Message List Run Mode you can:
Create a List of Messages that is Continuously Displayed
The list is created by adding message numbers to the list while the DL40 is
in the Run Mode. See Chapter 8 for additional information for adding (or
deleting) messages via the RS-485 Port or the Keyboard Port.
Important: The Message List will be lost if you leave the Run Mode, reset
the DL40, or cycle power. You will have to create a new list when you
re–enter the Run Mode. In addition:
•
Messages are displayed in the order they are put on the list.
Message List Run Mode