Rockwell-automation 1772-LP3 PLC - 2/30 Programmable Controller Progra Manual de usuario Pagina 259

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Bit Shifts
Chapter 14
147
Figure 14.4
EXAMINE
OFF SHIFT BIT Format
EXAMINE OFF
SHIFT BIT
FILE: 110
BIT NO.: 001
Numbers
shown are default values. Bold numbers must be replaced by userentered values. The number of default address digits
initially displayed  3, 4, or 5  will depend on the size of the data table. Initially displayed default values are governed by the I/O rack
configuration.
FILE :
Starting address of the file (file of bit shift instruction).
BIT NUMBER
:
Decimal number of the bit to be examined (1999).
Figure 14.5 shows the format of Figure 14.4 for the following conditions
for the shift register of Figure 14.1.
File – Starts at word 400
Bit No – Examine bit number 67 in the shift register for an off (0)
condition
Figure 14.5
EXAMINE
OFF SHIFT BIT Example Rung
EXAMINE OFF
SHIFT BIT
FILE: 400
BIT NO.: 067
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