Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 242)

Preface MicroLogix 1000 Programmable Controllers User Manual
12–28
Example 3
To enter the REM Run mode and have the HSC ACC and Interrupt Subroutine
resume their previous state, while externally initializing the HSC outputs, apply the
following:
Rung 2:0
Unlatch or Latch the output bits under HSC control during the first
scan after the HSC instruction is executed for the first time. (Note,
you
could place this rung before the HSC instruction; however, this is
not recommended.)
| S:1 +HSL–––––––––––––––+ |
|––][–––––––––––––––––––––––––––––––––––––––––––+HSC LOAD +–|
| 15 |Counter C5:0| |
| |Source N7:0| |
| |Length 5| |
| +––––––––––––––––––+ |
Rung 2:1
| +HSC––––––––––––––––––––+ |
|–––––––––––––––––––––––––––––––––––––+HIGH SPEED COUNTER +–(CU)–|
| |Type Encoder (Res,Hld)+–(CD) |
| |Counter C5:0+–(DN) |
| |High Preset 1000| |
| |Accum 0| |
| +–––––––––––––––––––––––+ |
Rung 2:2
This rung is programmed with the knowledge of an HSL mask of 0007
(Outputs
0–2 are used) and initializes the HSC outputs each REM Run mode entry.
Outputs O/0 and O/1 are off, while Output O/2 is on.
| S:1 O:0 |
|––][––––––––––––––––––––––––––––––––––––––––––––––––––––+––(U)––+|––|
| 15 | 0 | |
| | O:0 | |
| +––(U)–––+ |
| | 1 | |
| | O:0 | |
| +––(L)–––+ |
| 2 |