Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx - Manual (Page 243)

Chapter
9
Publication 1336 FORCE–5.13 –– September, 1998
Using the Trend Features
Chapter 9 provides information that can help you use trends. This
chapter covers the following topics:
•
using trend parameters
•
understanding how trending works
•
setting up the trigger point
•
adjusting the data sample rate
•
setting the number of post samples
•
setting the buffer type
•
forcing a trigger condition
•
using cascading trends
•
looking at the results of the trend
•
looking at trend examples
Trending is a diagnostic tool that you can use to capture and retain an
input parameter data value (such as velocity feedback) until a trigger
condition (drive fault or malfunction condition) halts or suspends
sampling. With trending, you can program the parameter to sample,
the trigger condition, the rate of sampling, and the number of post
samples taken once the trigger is true.
Chapter Objectives