Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 262)

Bit Shifts
Chapter 14
14Ć10
Figure 14.8
SET SHIFT BIT Format
SET SHIFT BIT
FILE: 110
BIT NO.: 001
Numbers shown are default values. Bold numbers must be replaced by userĆentered values. The number of default address digits
initially displayed Ċ 3, 4, or 5 Ċ 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 set (1Ć999).
Figure 14.9 format of Figure 14.8 for the following condition of the bit
shift register of Figure 14.1.
File – starts at word 400
8
Bit No. – set bit number 67 in shift register (Figure 14.1) to on (1).
Figure 14.9
SET SHIFT BIT Example Rung
SET SHIFT BIT
FILE: 400
BIT NO.: 067
The Reset Shift Bit output instruction turns off a specified bit in a bit
register such as that shown in Figure 14.1. The users specifies the bit
number of the bit to be turned off and the starting address of the file. The
instruction executes upon a true rung condition.
NOTE: If file is shifted, new data in the same bit position will be reset if
reset shift bit is still true.
14.6
Reset Shift Bit