Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 188)

Serial and Parallel Port Examples F–3
Publication 2706-807 – July 1998
Parallel Port Message Variable Slave Triggering Example
This example shows message triggering through the parallel port.
Masked Move
Source
N7:1
1<
Mask 0FFFFh
-1<
Dest O:3.0
1<
Move
Source
1
1<
Dest N7:1
1<
This SLC program triggers a message using the parallel port (Message Variable Slave Mode).
MOV
0000
MVM
0001
0002
A 1 sent to the strobe lines indicates that the data lines contain the number
of the message being triggered.
In this example, the strobe lines are the first four outputs in a 1746-OB16
output module located in the fourth slot of the SLC rack. Since the outputs
are the four least significant lines, a 1 sent to the output module makes
MS0 a 1 which indicates the data lines contain a message number.
Move
Source
1
1<
Dest N7:2
1<
MOV
This example shows how message number 1 would be triggered. The
value is placed in an integer file so that its value can be masked. This is
useful when the data and strobe lines are located on the same output
module.
Masked Move
Source
N7:2
1<
Mask 0FFFFh
-1<
Dest O:1.0
1<
MVM
0003
In this example, the data lines are located in a 1746-OB1 output module
located in the second slot of the SLC rack, so the message number data is
sent to O:1.0
Move
Source
8
8<
Dest N7:3
8<
MOV
0004
Enter: 8 for variable 1
9 for variable 2
10 for variable 3
11 for variable 4