Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 178)

Quick Reference Section
Appendix A
AĆ9
Table A.F
Data Manipulation Instructions
NOTE: Date manipulation instructions operate upon BCD valuessss and/or 16 bit data table. THe word address XXX, is displayed
above the instruciton; the BCD vlue or data operated uon YYY, is displayed beneath it. The data is stored in the lower 12 bits of the
wword address and can be any value from 000 to 999 BCD, excet as noted.
Word address displayed will be either 3 or 4 digits depending upon the data table size. When entering the word address, use a
leading zero if necessary.
Key Symbol
Instruction
Name
1770-T3
Display Rung Conditions
-[G]- Get XXX
-[G]-
YYY
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.
-(PUT)- Put XXX
-(PUT)-
YYY
The put instruction should be preceded by the get instruction.
When the rung is true, all 16 bits at the get instruction address are transferred
to the put instruction address.
-[<]- Less Than XXX
-[<]-
YYY
The less than instruction should be preceded by a get instruction.
3-digit BCD values at the get and less than word addresses are comapred. If
the logic is true, the rung is enabled.
-[=]- Equal To XXX
-[=]-
YYY
The equal to instruction should be preceded by a get instruction.
-[B]- Get Byte XXXD
-[B]-
YYY
D - Designates the upper or lower byte of the word.
1 = uper byte, 0 = lower byte.
YYY - Octal value from 000 to 377 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 comared with the upper and
lower limits of the limit test instruction.
-[L] Limit Test XXX AAA
-[L]- -
BBB
AAA - Upper limit of limit test, an octal value from 000 to 377.
BBB - Lower limit of limit test, an octal value from 000 to 377.
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 or equal to the limits, the rung is enabled.