AMETEK 1995A Micro-Set PLS - Manual (Page 15)

11 Installation and Maintenance Manual
Chapter 3: Programming
On units without Multiprogram, setpoint availability is dependent on the number of outputs enabled.
6 Outputs = 253 Setpoints Available
12 Outputs = 242 Setpoints Available
18 Outputs = 207 Setpoints Available
24 Outputs = 181 Setpoints Available
30 Outputs = 161 Setpoints Available
Refer to the Section 3.5: Selecting Number of Outputs.
3.12: Electronic Offset
The offset key is used to synchronize the digital display with the actual machine position. The Series
1995A PLS has full scale factor offset capabilities, and the offset is held in nonvolatile memory. How-
ever, to eliminate possible problems in the event that a replacement PLS is required, it is good practice
to mechanically synchronize the resolver with the machine and then use the offset key to make final, fine-
tune adjustments.
Programming the Electronic Offset
A) Unit must be in the “Program” mode.
B) Stop machine at a known location.
C) Depress . After this sequence is
completed, the display will change to the position entered. The display and outputs are now
synchronized with the actual machine position.
OFFSET (Actual Machine Position) ENT -
-
3.13: Reset-to-Preset
Remote Reset-to-Preset Value - This option allows the position of the PLS to be reset to a keypad
selected value; this value would be based on an input from a remote contact or proximity switch
mounted at a known location on the machine. Typical uses include compensation for slippage of idler
wheel-driven resolvers, cable stretch, gear train backlash, as well as, for synchronizing outputs with the
leading edge of products moving through a machine.
The reset-to-preset function of the 1995A requires an isolated contact closure. The isolated contact is
used as an input to the 1995A PLS; upon closure, it will reset the unit to its preprogrammed reset value.
If an auxiliary contact is available, it can be wired to the 1995A PLS to perform this function. If an
auxiliary contact is not available, a reset input relay (Part No. SD0395100) can be purchased and wired
to a 110V AC circuit to provide this output.