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Preface – Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers User Manual

Page 356

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Preface

MicroLogix 1000 Programmable Controllers User Manual

E–6

| | Low preset value | |
| | (cause low preset | |
| | int at reset) | |
| | | |
| | +MOV–––––––––––––––+ | |
| +–+MOVE +–+ |
| | |Source 0| | |
| | | | | |
| | |Dest N7:9| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | | |
| | | |
| | High Speed Counter | |
| | | |
| | +HSL–––––––––––––––+ | |
| + –+HSC LOAD +–+ |
| |Counter C5:0| |
| |Source N7:5| |
| |Length 5| |
| +––––––––––––––––––+ |

Rung 2:1
This HSC instruction is not placed in the high-speed counter interrupt
subroutine. If this instruction were placed in the interrupt
subroutine, the high-speed counter could never be started or
initialized (because an interrupt must first occur in order to scan the
high-speed counter interrupt subroutine).

| High Speed Counter |
| +HSC––––––––––––––––––––+ |
|––––––––––––––––––––––––––––––––––––––+HIGH SPEED COUNTER +–(CU)–|
| |Type Encoder (Res,Hld)+–(CD) |
| |Counter C5:0+–(DN) |
| |High Preset 1250| |
| |Accum 1| |
| +–––––––––––––––––––––––+ |