Allen-Bradley Logix5000

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364 Rockwell Automation Publication 1756-RM003N-EN-P - October 2011

Chapter 8 Array (File)/Misc. Instructions (FAL, FSC, COP, CPS, FLL, AVE, SRT, STD, SIZE)

Example 1: Search for a match between two arrays. When enabled, the FSC instruction

compares each of the first 10 elements in array_1 to the corresponding elements

in array_2.

00000000000000000000000000000000

00000000000000001111111111111111

11111111111111111111111111111111

00000000000000000000000000000000 0

00000000000000000000000000000000 1

00000000000000000000000000000000 2

00000000000000000000000000000000 3

11111111111111110000000000000000 4

11111111111111111111111111111111 5

11111111111111111111111111111111 6

11111111111111111111111111111111 7

11111111111111111111111111111111 8

11111111111111111111111111111111 9

Array_1 Array_2

The FSC instruction finds that these elements are

not equal. The instruction sets the .FD and .IN bits.

The .POS value (4) indicates the position of the

elements that are not equal. To continue

comparing the rest of the array, clear the .IN bit.

Control_3.pos

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