Allen-Bradley SLC 500 Series - Page 89

Publication 1747-RM001G-EN-P - November 2008
Math Instructions 4-27
Rung 2:0 uses standard math instructions to implement Pythagorean’s
theorem. Rung 2:1 uses the CPT instruction to obtain the same calculation.
| Rung 2:0 +XPY–––––––––––––––+ |
|–––––––––––––––––––––––––––––––––––––––––––––––––––––+–+X TO POWER OF Y +–+–|
| | |Source A N7:1| | |
| | | 3| | |
| | |Source B 2| | |
| | | | | |
| | |Dest N7:3| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | +XPY–––––––––––––––+ | |
| +–+X TO POWER OF Y +–+ |
| | |Source A N7:2| | |
| | | 4| | |
| | |Source B 2| | |
| | | | | |
| | |Dest N7:4| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | +ADD–––––––––––––––+ | |
| +–+ADD +–+ |
| | |Source A N7:3| | |
| | | 0| | |
| | |Source B N7:4| | |
| | | 0| | |
| | |Dest N7:5| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | +SQR–––––––––––––––+ | |
| +–+SQUARE ROOT +–+ |
| |Source N7:5| |
| | 0| |
| |Dest N7:0| |
| | 0| |
| +––––––––––––––––––+ |
| Rung 2:1 +CPT––––––––––––––––––––––––+ |
|––––––––––––––––––––––––––––––––––––––––––––––––+COMPUTE +–|
| |Dest N10:0| |
| | 0| |
| |Expression | |
| |SQR ((N7:1 ** 2) + (N7:2 **| |
| |2)) | |
| +–––––––––––––––––––––––––––+ |
| Rung 2:2 |
|–––––––––––––––––––––––––––––––––––––+END+––––––––––––––––––––––––––––––––––––|
| |