Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 183)

Quick Reference Section
Appendix A
AĆ14
Figure A.2
Sequencer Instructions
Key Sequence 1770-T3 Display Instruction Notes
EN
Sequencer Output
Counter Addr:
Current Step:
Seq Length:
030
001
001
DN
Words Per Step
File:
Mask:
1
110-110
010-010
030
17
030
15
SEQ 0
Output Words
SEQ 1
SEQ 2
Output instruction.
Increments, then transfers data.
Same data transferred each scan that the rung is true.
Counter is indexed by the instruction.
Input instruction.
Compares input data with current steps for equality.
Counter must be externally indexed by your program.
Requires 5-8 words of your program.
Outupt instruction.
NOTE: Numbers shown are default values. Numbers in shaded areas must be replaced by your entered values. The number of
default address digits initially displayed (3 or 4) will depend on the size of the data table.
Here is an explanation of each value:
Counter Address
Position
Seq Length
File
Mask
Load Words
Input Words
NOTE: Access the Data Monitor Display as follows:
Enter all instruction parameters. Press key sequence:
[DISPLAY] [0] for the binary monitor mode;
[DISPLAY] [1] for the hexadecimal monitor mode.
: Address of the instruction in the accumulated value area of data table.
: Position in sequencer table (accumulated value of counter).
: Starting address of source file.
: Number of steps (preset value of the counter).
: Starting address of mask file.
: Words fetched by the instruction.
: Words monitored by the instruction.
1: 010 2:
3: 4:
Unused output bits can be masked.
Requires 5-9 words of your program.
Sequencer Input
Counter Addr:
Current Step:
Seq Length:
030
000
001
Words Per Step:
File:
Mask:
1
110-110
010-010
Input Words
1: 010 2:
3: 4:
EN
Sequencer Load
Counter Addr:
Current Step:
Seq Length:
030
001
001
DN
Words Per Step:
File:
1
110-110
030
17
030
15
Input Words
1: 010 2:
3: 4:
Increments, then loads data.
Counter is indexed by the instruction.
Does not mask.
Requires 4-7 words of your program.
Words per Step : Width of sequencer table.
Output Words : Words controlled by the instruction.