Rockwell Automation 2706-DXX Dataliner Message Display DL5 Series - Manual (Page 64)

2706-UM001A-US-P
7-14 Using the Parallel Port
The following are descriptions of what occurs during each of the four
timing intervals (t0, t1, t2, and t3):
During t0, the trigger for message No. 1 and strobe line D15 to indicate
message number are placed on the data lines.
During t1, the message trigger and strobe are kept unchanged at the parallel
port for a minimum of 110 milliseconds.
During t2, the trigger for message No. 10 and strobe line D15 to indicate
message number are placed on the data lines, and the trigger for message
number 1 is removed.
During t3, the message trigger and strobe are kept unchanged at the parallel
port for 110 milliseconds.