Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 132)

Data Manipulation Instructions
Chapter 6
6Ć10
Table 6.A
Data Manipulation Instructions
NOTE: Data Manipulation instructions operate upon BCD values and/or 16 bit data in the Data Table. The word address, XXX, is displayed above the
instruction; the BCD value or data operated upon, YYY, is displayed beneath it. The BCD value is stored in the lower 12 bits of the word address and
can be any value from 000 to 999, except as noted.
Word address displayed will be either 3, 4, or 5 digits depending upon the Data Table size. When entering the word address, use a leading zero, if
necessary.
Keytop Symbol Instruction Name 1770ĆT3 Display Description
-[ G ]- GET ăXXX
-[ G ]-
ăYYY
The GET instruction is used with other Data Manipulation
or Arithmetic instructions.
When the rung is TRUE, all 16 bits of the GET instruction
are duplicated and the operation of the instruction following
it is performed. See Note.
-(PUT)- PUT ąXXX
-(PUT)-
ąYYY
The PUT instruction should be preceded by the GET
instruction.
When the rung is TRUE, all 16 bits of the GET instruction
address are transferred to the PUT instruction address.
See Note.
-[ < ]- LESS THAN ăXXX
-[ < ]-
ăYYY
The LESS THAN instruction should be preceded by a GET
instruction.
3Ćdigit BCD values at the GET and LESS THAN word
addresses are compared. If the logic is TRUE, the rung is
ENABLED. See Note.
-[ = ]- EQUAL TO ăXXX
-[ = ]-
ăYYY
The EQUAL TO instruction should be preceded by a GET
instruction.
3Ćdigit BCD values at the GET and EQUAL TO word
addresses are compared. If equal, the rung is ENABLED.
See Note.
-[ B ]- GET BYTE ăXXX D
-[ B ]-
ăYYY
D - Designates the upper or lower byte of the word.
1 = upper byte, 0 = lower byte.
YYY - Octal value from 000
8
to 377
8
stored in the upper or
lower byte of the word address.
The GET BYTE instruction should be followed by a LIMIT
TEST instruction.
A duplicate of the designated byte is made and compared
with the upper and lower limits of the LIMIT TEST
instruction. See Note.
-[ L ]- LIMIT TEST ăXXX AAA
-[ L ]ĊĊĊ
BBB
AAA - Upper limit of LIMIT TEST, an octal value from 000
8
to 377
8
.
BBB - Lower limit of LIMIT TEST, an octal value from 000
8
to 377
8
.
The LIMIT TEST instruction should be preceded by a GET
BYTE instruction. Compares the value at the GET BYTE
instruction with the values at the LIMIT TEST instruction. If
found to be between the limits, the rung is ENABLED. See
Note.