Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 76)

4–16 Running Applications
Publication 2706–816
Note: An embedded Carriage Return control character (decimal 13)
is not allowed in the ASCII Text portion of the slave packet.
Field 3: Optional Display Mode Byte
This optional field indicates how the message text is to be displayed.
The following characters are used:
Byte Decimal Value Definition
Default –
Holding message, non-Auto Clear
If the message is longer than the display width, Wait
Time between segments of the message is 1
second.
Ctrl-A 1
Holding message, non-Auto Clear
If the message is longer than the display width, Wait
Time is 3 seconds.
Ctrl-C 3
Scrolling message, non-Auto Clear, Scroll Time 0.2
seconds, Wait Time is 1 second.
Ctrl-V 22
Center message (message length must be less than
or equal to the number of characters in the display
line for that text size).
If the Optional Display Mode Byte is omitted, the message will
remain displayed on the slave device unless it is cleared. If the
message is longer than the packet length, the first segment of the
message remains displayed for 1 second. After 1 second the second
packet is sent with the next portion of the message, and so on until
all packets have been sent. The message will repeat this cycle unless
it is cleared.
If Auto Format is enabled,the Optional Display Byte defaults to the
default status unless the Scroll or Center Message attribute is
enabled.
The Optional Display Mode Byte may be manually placed in the
message by embedding it as the last character in the text portion of
the message. It overrides a character embedded by Auto Format.
Field 4: Slave Address
The Slave Address Byte is a single byte field that specifies the Node
Address of the receiving slave device. Valid slave node addresses are
integers from 1 to 127, except for 13.
Note: If a Slave Device has a Node Address of 127, it will respond
to all messages, regardless of the slave packet address. If a message
packet has a Node Address of 127 it will be received by all slave
devices on the network.