Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 450)

Appendix E
Application Example Programs
E–7
Rung 4:1
➀
Keeps track of the hole number that is being drilled and loads the correct
high-speed counter preset based on the hole count. This rung is only
active when the ”hole selector switch” is in the ”3-hole” position. The
sequencer uses step 0 as a null step upon reset. It uses the last step as
a ”go forever” in anticipation of the ”end-of-manual” hard-wired external
reset.
| hole |hole 3-hole |
| selector |selector preset |
| switch |switch sequencer |
| bit 0 |bit 1 |
| I:0 I:0 +SQO–––––––––––––––+ |
|––––]/[––––––––] [–––––––––––––––––––––+–+SEQUENCER OUTPUT +–(EN)–+–|
| 9 10 | |File #N7:50+–(DN) | |
| | |Mask FFFF| | |
| | |Dest N7:7| | |
| | |Control R6:4| | |
| | |Length 5| | |
| | |Position 0| | |
| | +––––––––––––––––––+ | |
| | | |
| | force the | |
| | sequencer | |
| | to increment | |
| | on next scan | |
| | R6:4 | |
| +––––(U)––––––––––––––––––––+ |
| EN |
Rung 4:2
Is identical to the previous rung except that it is only active when the
”hole selector switch” is in the ”5-hole” position.
| hole |hole 5-hole |
| selector |selector preset |
| switch |switch sequencer |
| bit 0 |bit 1 |
| I:0 I:0 +SQO–––––––––––––––+ |
|––––] [––––––––]/[–––––––––––––––––––––+–+SEQUENCER OUTPUT +–(EN)–+–|
| 9 10
➁
| |File #N7:55+–(DN) | |
| | |Mask FFFF| | |
| | |Dest N7:7| | |
| | |Control R6:5| | |
| | |Length 7| | |
| | |Position 0| | |
| | +––––––––––––––––––+ | |
| | force the | |
| | sequencer | |
| | to increment | |
| | on the next | |
| | scan | |
| | R6:5 | |
| +––––(U)––––––––––––––––––––+ |
| EN |
➀ This rung accesses I/O only available with 32 I/O controllers. Therefore, do not include this rung
if you are using a 16 I/O controller.
➁ This instruction accesses I/O only available with 32 I/O controllers. Therefore, do not include this
instruction if you are using a 16 I/O controller.