Emerson FM-3 manual PLS On Point, PLS Off Point

Setting Up Parameters

is only updated when Index# is run. The direction of the PLS does not matter, the Index.#.PLSStatus will activate and deactivate the same incremental distance from the start of the index.

PLS On Point

This parameter is an incremental distance from the start position of the index, at which the PLS.#.Status will become active. It is an unsigned value in user units. The On Point must always be less than the Off Point.

PLS Off Point

This parameter is an incremental distance from the start position of the index, at which the PLS.#.Status will deactivate. It is an unsigned value in user units. The Off Point must always be greater than the On Point. If the Off Point is larger than the Distance parameter in an Incremental type of index, the PLS Status will never deactivate until the index is run again.

Example 1:

Index 0 is an Incremental index with a distance of 5 Revs. The PLS On Point is set to 1 Rev, and the PLS Off Point is set to 4 Revs. A home is completed, and Position Feedback is equal to 0.0 Revs.

If Index 0 is run, the Index.0.PLSStatus will activate when the feedback position reaches 1 Rev and remain active until feedback position reaches 4 Revs, and deactivate. At the end of Index 0, position feedback is equal to 5 Revs. If we initiate Index 0 again, Index.0.PLSStatus will activate 1 Rev into the index, or at 6 Revs. It will remain active until position feedback reaches 9 Revs, and deactivate. This index could be run over and over again, and Index.0.PLSStatus will activate 1 Rev from the starting position and deactivate 4 Revs from the starting position every time.

Example 2:

Index 1 is an Incremental index with a distance of -10 revs. The PLS On Point is set to 4 Revs, and the PLS Off Point is set to 6 Revs. A home is completed, and Position Feedback is equal to 0.0 Revs.

If Index 1 is run, the Index.1.PLSStatus will activate when the position feedback reaches -4 Revs (or 4 Revs from the start of the index). Index.1.PLSStatus will then deactivate when position feedback reaches -6 Revs (or 6 Revs from the start of the index). If Index 1 is run again, Index.1.PLSStatus will activate and deactivate at -14 Revs and -16 Revs respectively.

Index PLS’s can be used on any type of an index.

If an index is so short (possible in the case of an absolute index) that it reaches the On Point, or incremental distance, into the index, but never reaches the Off Point, the Index.#.PLSStatus will remain active until the index is run again.

Similarly, if the index is so short that it never reaches the On Point, the Index.#.PLSStatus will never activate.

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