Rockwell-automation 1746-HSTP1 Stepper Controller Module/ User Manual Uživatelský manuál stáhnout pdf (Strana 67)

Publication 999-121 - December 1999

6-4

Application Examples

Entering Negative Position Data

The position data is sign magnitude. There are three ways to easily

assign a negative number:

• Using the ladder

• Manipulating the bits manually

• Calculating manually

To enter negative position data using the ladder:

1. Divide the absolute value into most (MSW) and least significant

(LSW) words.

2. Use bitwise “inclusive or” with MSW and 32768.

3. Place the result in the position MSW, LSW.

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 81 82

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Rockwell-automation 1746-HSTP1 Stepper Controller Module/ User Manual Uživatelský manuál Strana 67