Rockwell-automation 1336T Function Block Prog. Manual, Series A/B Instrukcja Użytkownika Pobierz pdf (Strona 115)

Function Block Library 4–53

1336 FORCE — 5.9 August 1995

OUTPUTS

Dir — A signed integer that indicates counter direction —

–1 if decrementing, 0 if no change, 1 if incrementing.

@Hi Lim — A logic value = true only when the accumulator >

Max.

@Lo Lim — A logic value = true only when the accumulator <

Min.

Output — A signed integer that is the counter’s output.

FUNCTION

1. If Set ≠ 0, the accumulator = Preset.

2. When Select = 0 and Time = time since last adjustment of

accumulator:

If Inc ≠ 0, the accumulator = accumulator + UD1, and Dir = 1.

If Dec ≠ 0, The accumulator = accumulator – UD1, and Dir = –1.

3. When Select ≠ 0 and Time = time since last adjustment of

accumulator:

If Inc ≠ 0, the accumulator = accumulator + UD2, and Dir = 1

If Dec ≠ 0, The accumulator = accumulator – UD2, and Dir = –1.

4. When the accumulator > Max:

The accumulator = Max, @Hi Lim = true, and @Lo Lim = false.

5. When the accumulator < Min:

The accumulator = Min, @Hi Lim = false, and @Lo Lim = true.

6. When the accumulator is < Max and > Min:

@Lo Lim = @Hi Lim = false.

7. When Output = accumulator, Dir = 0.

PARAMETERS DATA TYPE LINKABLE DEFAULT VALUE RANGE

Set Logic Input Yes False True/False

Inc Logic Input Yes False True/False

Dec Logic Input Yes False True/False

Max Signed Integer No 0

±32767

Min Signed Integer No 0

±32767

UD1 Signed Integer No 0 0 to +32767

UD2 Signed Integer No 0 0 to +32767

Select Logic Input No False True/False

Preset Signed Integer No 0

±32767

Time Unsigned Integer No 0 0 to 65535

Dir Signed Integer No —

±32767

@Hi Lim Logic Input No — True/False

@Lo Lim Logic Input No — True/False

Output Signed Integer No —

±32767

UP/DWN CNTR

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