Rockwell Automation 2706-LV2S_LV4S DL40 PLUS SLAVE USER MANUAL - Manual (Page 33)

Publication 2706-6.3
4-2 Dataliner (DL) Slave Mode
Slave Mode Protocol
Messages sent to the DL40 Plus Slave in DL Slave mode must have
the following format:
If you are using a DL40 Plus as the master, configure its
communication port for DL Slaves (refer to the DL40 Plus user
manual, Publication 2706-6.1). This configures the DL40 master to
send message data in the DL Slave format.
20 Characters to Display
Send the message text characters to be displayed. ASCII characters
32 to 255 (20hex to FFhex) are supported. All control characters
within the message text field, except [Ctrl][F] and [Ctrl][R], are
ignored. Any valid ASCII character, upper or lower case can be sent.
If fewer than 20 characters are sent, the remaining character positions
are filled with spaces. Refer to Appendix A for the character sets
available for the selected language character set (DIP switch settable,
see Chapter 2).
Slave Address
A one byte character from 1 to 127 (1 to 7F hex) that specifies the
address of the slave display that is to receive the message.
The following addresses are invalid:
• 13 (0Dhex) is invalid because it corresponds to Carriage Return
• 18 (12hex) is invalid because it corresponds to Ctrl-R
• If you select an invalid address, the DL40 overrides the setting
with an address of 127.
Address 127 is a global address that accepts all messages regardless
of the message’s address. In addition, any message sent with the
address 127 is received by all slave displays. Use address 127 for
messages you want displayed on all slaves instead of repeating the
same message to multiple displays.
Line Number
A one byte character specifying the line number the message is to be
displayed on. Valid line numbers are 1 to 4 decimal (not ASCII 1 to
4). Ctrl-A = 1, Ctrl-B = 2, Ctrl-C =3 and Ctrl-D = 4.
Carriage Return
Message is terminated by a carriage return, Ctrl-M (decimal 13,
0Dhex).
20 Characters
to Display
Slave
Address
Line
Number
Carriage
Return