Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 87)

1 Publication 1762-UM001G-EN-P - March 2011
Chapter
5
Use Trim Pots
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 memory module port cover and to the
right of the communications port, as shown below.
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 file data is updated continuously whenever the controller is powered
up.
0
1
COM
Trim Pot 0
Trim Pot 1
Maximum
(fully clockwise)
Minimum
(fully counterclockwise)