AMETEK 2120 PLC Interface Module - Manual (Page 33)

Installation and Programming Manual
Chapter 4: Programming
29
Position Offset (302)
NOTE: The display will read in inches or millimeters when used with an LDT. Make sure
the unit of measurement function is selected to your desired units before entering the
value for the Position Offset function. The unit of measurement is set in inches at the
factory. For instructions on selecting the unit of measurement, see Unit of Measurement
in Section 4.3: Monitor Setup Functions.
The Position Offset function is used to synchronize the monitors displayed value with actual
machine position. This value can range from -99.999 to 999.999 inches. With the machine
stationary at a known position, enter the desired position value using this function:
Figure 4-2 Count Direction Function Drawing
Enter desired
reading
1. Select the function key.
The monitor displays “F-----”.
2. Select function number 302. Select the enter key.
The monitor displays the current position.
3. Enter the new position value. Select the enter key.
302
100
Count Direction Function = 0
100
Count Direction Function = 1
When the Count Direction Function
is programmed with a value of 0, the
display value will increase when the
LDT’s magnet assembly is moving away
from the head of the LDT.
When the Count Direction Function
is programmed with a value of 1, the
display value will increase when the
LDT’s magnet assembly is moving
toward the head of the LDT.
(F)
0
0