Rockwell Automation 1771-TCM,D17716.5.108 TEMPERATURE CONTROL MOD - Manual (Page 101)

Appendix C
Example Ladder Logic Program
C-9
Wed Jun 1, 1994 Page 3
Program Listing Report PLC–5/40 File TCM Rung 30:0
Rung 30:0
| ENABLE |
| BTR FROM TCM BTR |
| TCM TIMER |
| B21 +TON–––––––––––––––+ |
+––––]/[–––––––––––––––––––––––––––––––––––––––––––––+TIMER ON DELAY +–(EN)–+
| 48 |Timer T27:0| |
| |Time base 0.01+–(DN) |
| |Preset 0| |
| |Accum 0| |
| +––––––––––––––––––+ |
Rung 30:1
| ENABLE |
| TCM BTR BTR FROM |
| TIMER DONE TCM |
| T27:0 B21 |
+––––] [–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––(L)–––––+
| DN 48 |
Rung 30:2
The following two rungs will ”continuously” read the current status data being
returned from TCM. The XIC,B24/12 and XIC,B24/13 permissives in the second
rung are not required for file operation, but are included in the event that
the TCM BTR rung is moved to Program File #002.
| CONTROL |
| WORD FOR |
| ENABLE BTR FM |
| BTR FROM TCM |
| TCM |
| B21 +BTR––––––––––––––––––––+ |
+––––] [––––––––––––––––––––––––––––––––––––––––+BLOCK TRANSFER READ +–(EN)–+
| 48 |Rack 00| |
| |Group 2+–(DN) |
| |Module 0| |
| |Control block B24:0+–(ER) |
| |Data file B24:10| |
| |Length 0| |
| |Continuous N| |
| +–––––––––––––––––––––––+ |
Rung 30:3
| ERROR |
| PERFORMING BTR FROM |
| BTR FROM TCM |
| TCM ENABLED |
| B24 B24 |
+–+–––] [––––+––––––––––––––––––––––––––––––––––––––––––––––––––––+–––(U)––––+–+
| | 12 | | 15 | |
| | BTR FROM | | ENABLE | |
| | TCM | | BTR FROM | |
| | COMPLETE | | TCM | |
| | B24 | | B21 | |
| +–––] [––––+ +–––(U)––––+ |
| 13 48 |