Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 279)

Chapter 14
Using High-Speed Counter Instructions
14–29
Adding to File 2
Ladder Rungs
Rung 2:0
Initializes the high–speed counter each time that the RRUN mode is
entered. The high–speed counter data area (N7:5 – N7:9) was chosen to
correspond with the starting address (source address) of our HSL
instruction. Note that the HSC instruction is disabled each entry into
the RRUN mode until the first time that it is executed as true. (The high
preset was ”pegged” on initialization to prevent a high preset interrupt
from occurring during the initialization process.)
| 1’st Output Mask |
| Pass (only use bit 0 |
| ie. O:0/0) |
| S:1 +MOV–––––––––––––––+ |
|––––] [–––––––––––––––––––––––––––––––––––––+–+MOVE +–+–|
| 15 | |Source 1| | |
| | | | | |
| | |Dest N7:5| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | High Output Pattern | |
| | (turn off O:0/0) | |
| | | |
| | +MOV–––––––––––––––+ | |
| +–+MOVE +–+ |
| | |Source 0| | |
| | | | | |
| | |Dest N7:6| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | High Preset Value | |
| | (counts to next hole)| |
| | |
| | +MOV–––––––––––––––+ | |
| +–+MOVE +–+ |
| | |Source 32767| | |
| | | | | |
| | |Dest N7:7| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | Low output pattern | |
| | (turn on O:0/0 | |
| | each reset) | |
| | |
| | +MOV–––––––––––––––+ | |
| +–+MOVE +–+ |
| | |Source 1| | |
| | | | | |
| | |Dest N7:8| | |
| | | 0| | |
| | +––––––––––––––––––+ | |
| | 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| |
| +––––––––––––––––––+ |