Delta MMC120 User Manual download pdf (Page 93)

DCS120 Diagnostic and Setup Program User Notes

Delta Computer Systems, Inc. 360/254-8688 93

User Notes

Negative Offset

DCS120 displays both positive and negative numbers in the position, extend limit, and retract limit fields. The way

position and limit fields are displayed is determined by the offset field. Most applications requiring an offset use a

negative offset. The rule is: all numbers between the negative offset and 0 are displayed as negative numbers.

Example:

OFFSET 0 position range 0 to 65535 (65536 total steps)

OFFSET -1000 position range -1000 to 64535

OFFSET -6000 position range -6000 to 59535

OFFSET -10000 position range -10000 to 55535

OFFSET -20000 position range -20000 to 45535

OFFSET -30000 position range -30000 to 35535

For any negative offset, values greater than the maximum position but less than the maximum number of steps are

treated and displayed as negative numbers:

OFFSET -30000 position range -30000 to 35535 (65536 total steps)

A position request of 45000 is displayed as: 45000 - 65536 = -20536

View Data Command

The View Data command (Ctrl-V) displays raw Counts, Target, Status, and time information. (Speed values are

calculated by DCS120.)

Sum of Errors Squared (ÿe

)

A sum of errors squared term is included on the top line of the plot screen. You can use this term by noting if it’s

getting smaller or larger as you change parameters; the smaller the number the better-tuned the axis. Repeat the tuning

steps in the MMC120 manual using the same profile terms until you get the lowest number.

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Delta MMC120 User Manual Page 93