Bit Shift Registers
Chapter 20
20-8
Here are some characteristics of an Examine Off Bit Shift instruction:
Program as an input instruction
Key sequence [Shift] [Reg] [1] [8]
Requires 3 words of your program
Programming an Examine Off Bit Shift Instruction
To program an Examine Off Bit Shift:
The prompt SHIFT REGISTER 12 appears in the lower left hand corner of
the screen.
EXAMINE OFF
FILE:
BIT NO.
001
070
00
110
SHIFT BIT
18
A display represented by Figure 20.6 shows the format of an Examine Off
Bit Shift.
Figure 20.6
Examine Off Bit Shift Format
EXAMINE OFF
FILE:
BIT NO.
001
110
SHIFT BIT
Numbers shown are default 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.
This Value:
Stores This:
File
Starting address of the file (file of bit shift instruction).
Bit number
Decimal number of the bit to be examined (1999).
