Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 69)

Chapter 7
Messages
7 – 6
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 an 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.
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 will insert the symbol for a single byte data request (
↑
).
Insert Time Into a Message With [CTRL][T]
To enter the time into a message, place the cursor just after the point where
you want the time inserted. Use
[CTRL][T] to specify the insertion position.
The software will insert the symbol for a time variable (HH:MM:SS).
Note: The time variable occupies 8 of the available 20 characters on a
display line.
You can use the time variable in any Run Mode.
Insert Date Into a Message With [CTRL][Y]
To enter the date into a message, place the cursor just after the point where
you want the date to appear, and then press
[CTRL][Y] . The software will
insert the date symbol (DAY MON YR).
Note: The date variable occupies 10 of the available 20 characters on a
display line.