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Rockwell Automation Publication 1756-RM003N-EN-P - October 2011 433
Array (File)/Shift Instructions (BSL, BSR, FFL, FFU, LFL, LFU) Chapter 9
Example: When enabled, the LFU instruction unloads array_dint[5] into value_2.
Before LIFO unload After LIFO unload
array_dint[0] 00000 00000
11111 11111
22222 22222
33333 33333
44444 44444
array_dint[5]
55555 00000 control_1.pos = 5
00000 control_1.pos = 6 00000 value_2 = 55555
00000 00000
00000 00000
00000 00000