Rockwell Automation 2706-LSW DL40 PLUS OFFLINE PROG.SFTWR.USER MANUAL - Manual (Page 56)

4–14 Creating Message Files
Publication 2706-6.2
Insert Request for ASCII Input Data With [CTRL][X]
A data request requires that ASCII Input Data, an 8-bit ASCII
character, be entered through the keyboard port into the message
being displayed.
•
When returning ASCII Input Data via RS-485 Port, the message
requesting the data must be triggered via the RS-485 Port. This is
true for both Parallel Port and Remote I/O units. Data is
automatically entered when you press
[
↵
] .
Note: Data is returned to the triggering device without
solicitation by the device and without checking that data was
received by the device.
•
With Remote I/O units, the ASCII input data will be sent via
Remote I/O Port to your PLC as part of the Return Message
Number Being Displayed (described in the DL40 Plus Dataliner
Message Display User Manual, Publication 2706-6.1). Data can
be returned to your PLC in:
– Message/Variable/Slave Run Mode
– Message/Variable Run Mode
– Message List Run Mode
User requested data is sent to the PLC as part of the I/O scan. Up
to 20 ASCII characters can be sent with Block Transfer. Up to 12
ASCII characters can be sent with Discrete, depending on rack
size.
The Enter bit will be set only after all ASCII data requested has
been put into the message. Data should not be considered valid
until the Enter bit is set.
Important: If more ASCII data is requested than can be returned to
the PLC, the excess data will be lost.
To enter a data request, place the cursor just after the point where
you want to insert the request. Use [CTRL][X] to specify the
insertion position. The software inserts the symbol for a single byte
data request (
↑
).