Allen-Bradley micrologix 1500, Руководство пользователя

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1 Publication 1764-UM001A-US-P
Chapter
5
Using Trim Pots and the Data Access Tool (DAT)
Trim Pot Operation The processor has two trimming potentiometers (trim pots) which allow
modification of data within the controller. Adjustments to the trim pots change the
value in the corresponding Trim Pot Information (TPI) register. The data value of
each trim pot can be used throughout the control program as timer, counter, or
analog presets depending upon the requirements of the application.
The trim pots are located below the mode switch under the left access door of the
processor.
Use a small flathead screwdriver to turn the trim pots. Adjusting their value causes
data to change within a range of 0 to 250 (fully clockwise). The maximum rotation
of each trim pot is three-quarters, as shown below. Trim pot stability over time and
temperature is typically ±2 counts.
Trim pot data is updated continuously whenever the controller is powered-up.
RUN PROG
REM
Trim Pot 0
Trim Pot 1
Maximum
(fully clockwise)
Minimum
(fully counterclockwise)
AB Spares