Allen Bradley1756-PB75RModule New In Stock

Introduction

However, if you schedule two high priority tasks 1…5 to run every millisecond, and they both require 500 s or more to execute, no CPU time would be left for the dedicated I/O task. Furthermore, if you have so much configured I/O that the execution time of the dedicated I/O task approaches 2 ms (or the combination of the high priority tasks and the dedicated I/O task approaches 2 ms) no CPU time is left for low priority tasks 7…15. TIP For example, if your program needs to react to inputs and control outputs at a set rate, configure a periodic task with a priority higher than 6 (1…5). This keeps the dedicated I/O task from affecting the periodic rate of your program. However, if your program contains a lot of math and data manipulation, place this logic in a task with priority lower than 6 (7…15), such as the continuous task, so that the dedicated I/O task is not adversely affected by your program.

Allen Bradley Main Products:

1. SLC500:1747/1746 series 2.MicroLogix: 1761/1763/1762/1766/1764 series 3.CompactLogix: 1769/1768 series 4. The ControlLogix: 1756/1794/1760/1788 series 5. PLC-5:1771/1785 series 6.2711,2711P PanelView man-machine interface, touch screen, operation panel 7.22A,22B, 20 small frequency converter,150 soft starter 8. ProSoft: MVI69 / PS69 / MVI56 / MVI94 / MVI71 / MVI46/3150 9. ICS TRIPLEX: T8431 / T8461 / T3401 / T8310

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