AMETEK 2120 PLC Interface Module - Manual (Page 28)

24 Installation and Programming Manual
Chapter 4: Programming
Turns Counting Wrap Around (308)
When using the Turns Counting software described above where the Turns Count Function (301)
is set for 2 or more, you have the option of selecting the Wrap Around feature. Under normal
operation, you select a scale factor using function 300 followed by the number of turns required
to reach the selected scale factor using function 301. Upon reaching the selected scale factor,
the count will continue to increase at the same rate if the resolver continues rotating in the same
direction. With a scale factor of 100 and a turns count of 2, the module will count from zero
to 100 over the fi rst two rotations and will continue to increase by a factor of 100 for every
additional two turns in the same direction. The Wrap Around function allows you to program a
scale factor followed by the number of turns required to reach the scale factor. Upon reaching
one digit less than the scale factor, the display and output count wraps around to zero and begins
counting up at the same rate over continued rotation in the same direction.
Position Offset (302)
The Position Offset function is used to synchronize the resolver’s position with the actual
machine position. The default value for this function is 0. This function is used to adjust the
Interface Module’s indicated position so that it truly refl ects the machine’s position.
Programming Scale Factor (300)
This subsection provides the necessary instructions to program the scale factor. Once these steps
have been performed they will not have to be repeated.
1. Select the function key.
The monitor displays “F-----”.
2. Enter function number 10. (This is the Program Mode Access function which
allows you to put the monitor in program mode. Only when the Interface
Module is in program mode can other functions be programmed.) Select the
enter key.
The monitor displays “000000”.
NOTE: If the Interface Module displays only one zero (i.e. “0”), then the program lockout
connector is not jumpered. For wiring instructions, see Section 3.2: Wiring.
3. Enter the program mode access code. The default code is 2100. Select the
enter key.
The monitor is now in program mode. The program mode LED is turned on.
Enter pro-
gram mode
access code
(F)
10