Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 61)

Chapter 5
Serial Communications
5–11
Field 6: Message Attributes (continued)
Special Control Characters
When operating in the slave mode, the DL50 will recognize the following
special control characters:
•
Ctrl F [FLASH]
The Ctrl F (decimal 6) control character causes the DL50 to toggle
between flashing and non-flashing characters. Text which is between two
Ctrl F characters will flash, all other characters will be non-flashing.
For Example:
Assume that the character ^ denotes a Ctrl-F. If the following message is
sent:
This is a message with ^FLASHING TEXT^ along with non-flashing text.
The words FLASHING TEXT will flash while the other words will be
nonĆflashing.
•
Ctrl R [RESET]
The Ctrl R (decimal 18) control character causes the DL50 to clear all
data in the message buffer, toggle the flashing message attribute to off,
and reset the display color to the default specified by the dipswitch
settings (see Figure 3.2). This control character does not affect a message
being currently displayed.
Note: We recommend that the host device send a Ctrl-R (decimal 18)
command to all slave displays when the system is powered up, and also
each time before a message packet is sent to a specific slave address. This
clears any data that might interfere with the new message.
•
Ctrl X [RED]
The Ctrl X (decimal 24) control character changes all subsequent
characters to Red until another special control character is received or the
end of the message occurs. After the end of the message, the default color
is re-established. (Tri-color displays only.)
•
Ctrl Y [AMBER (YELLOW)]
The Ctrl Y (decimal 25) control character changes all subsequent
characters to Amber until another special control character is received or
the end of the message occurs. After the end of the message, the default
color is re-established. (Tri-color displays only.)
•
Ctrl Z [GREEN]
The Ctrl Z (decimal 26) control character changes all subsequent
characters to Green until another special control character is received or
the end of the message occurs. After the end of the message, the default
color is re-established. (Tri-color displays only.)
Duplex Protocol (continued)