Rockwell Automation 2707-L40X_L8X_V40X DTAM Plus Operator Interface Module Installation Instructions - Manual (Page 67)

Chapter 4
Running Applications
4–5
The DTAM Plus allows ASCII data to be directly entered from a device such
as a bar code scanner. An ASCII entry screen looks like a standard data
entry display. When the ASCII input screen is displayed, data can then be
entered through the ASCII device connected to the printer port using the
2707-NC6 cable.
Here are some items you should note when using a bar code scanner as an
input device for data entry fields.
•
Odd character counts from the scanner are rounded up to create even byte
counts. This facilitates word writes to the controller. If rounded up, the
last character written will be a Null.
•
When displaying an ASCII data entry screen, the following DTAM keys
are active:
MAIN
MENU
PREV
MENU
PREV NEXT
and the following keys are inactive:
EXP
F
and the key is not available for printing screens
•
If keypad entry is enabled, you can enter the ASCII character’s decimal
equivalent value into the data entry field. The ASCII input is also
enabled at the same time. This allows input from both sources. For
example, an operator can manually enter 3 characters and then scan a bar
code containing 8 characters. The DTAM would then write all 11
characters to the controller. Data is written to the controller on receipt of
an ASCII carriage return or when the [RETURN] key is pressed.
ASCII Input