Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 47)

Using Special Messages 3–2
Publication 2706-6.1
901 (or 01) Terminate Message – Clear Display
Immediately terminates the message that is running and clears the
display. If a message is in the queue, that message will start running
immediately after the previous message is terminated.
If a terminated message is sent to a printer and/or a slave, the
message is terminated after the current line sent to the printer or
slave is completed.
Special message 901 will not clear a message displayed on a slave
unit. You must send another message to the slave for display or cycle
power to the slave.
The following special messages complete their functions before this
Special message takes effect: 901-905, 909, 912, 913, 915, 916.
902 (or 02) Clear Queue
Immediately clears the message queue. If a message is running it will
finish running.
903 (or 03) Terminate Message – Clear Display and Queue
Immediately terminates the message that is running, clears the
message queue, and clears the display.
If a terminated message is sent to a printer and/or a slave, the
message is terminated after the current line being sent to the printer
or slave is completed.
Special message 903 will not clear a message displayed on a slave
unit. You must send another message to the slave for display or cycle
power to the slave.
The following special messages complete their functions before this
Special message takes effect: 901-905, 909, 912, 913, 915, 916.
904 (or 04) Reset Unit
Causes the DL40 Plus display to immediately go through its normal
power-up sequence. This aborts all other functions of the display.
Special message 904 will not clear a message being displayed on a
slave unit. You must send another display message to the slave or
cycle power to the slave.