Parallel port message list mode triggering example – Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL User Manual
Page 190
Serial and Parallel Port Examples
F–5
Publication 2706-807 – July 1998
Parallel Port Message List Mode Triggering Example
This example shows message triggering through the parallel port.
Masked Move
Source
N7:1
2<
Mask
0FFF0Fh
-16<
Dest
O:3.0
2<
Move
Source
2
2<
Dest
N7:1
2<
This SLC program triggers a message using the parallel port (Message List Mode). This example uses a
1746-OB16 output module with the four least significant output lines tied to the strobe lines of the DL40 Plus.
MOV
0000
MVM
0001
0002
Enter: 1 to send a Priority Message
2 to add a message to the list
3 to delete a message from the list
The data is placed in an integer file and then masked to make sure that the
data is not corrupted. This is useful when the data and strobe lines are
located in the same module.
Move
Source
1
1<
Dest
N7:2
1<
MOV
The message number to be added, deleted, or triggered as a priority
messsage is entered here. In this example, message number 1 is added to
the list..
Masked Move
Source
N7:2
1<
Mask
0FFFFh
-1<
Dest
O:1.0
1<
MVM
0003
<END>
0004