Rockwell-automation 1771-DE Absolute Encoder Module User Manual Bedienungsanleitung PDF herunterladen (Seite 47)

Appendix A

AĆ6

Figure A.2

PLCĆ2/30

Local System Example

PLC–2/30

1

7

7

1

A

L

1

7

7

1

D

E

Rack 1

1

7

7

1

A

L

1

7

7

1

D

E

Rack 3

1

7

7

1

A

L

1

7

7

1

D

E

Rack 4

1

7

7

1

A

L

1

7

7

1

D

E

Rack 2

10813-I

Solution:

Program length = 4K words

Number of chassis = 4 (1 assigned rack number per chassis)

Number of block-transfer words, W = 2 (read) or 20 (write)

1. Calculate the system values.

Processor Scan Time (PS) = (5 ms/1K words) x (4K words) = 20

ms

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 79 80

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