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Ladder Logic Elements and Instructions
384
870 USE 101 00 V.3
Standard Ladder Logic Elements, Continued
Standard Ladder
Logic
Instructions,
Continued
Continued on next page
Symbol Meaning Nodes Consumed
DX Matrix Instructions
AND Logically ANDs two matrices 3
OR Does logical inclusive OR of two matrices 3
XOR Does logical exclusive OR of two matrices 3
COMP Performs logical complement of values in a matrix 3
CMPR Logically compares values in two matrices 3
MBIT Logical bit modify 3
SENS Logical bit sense 3
BROT Logical bit rotate 3
AD16 Signed/unsigned 16-bit addition 3
SU16 Signed/unsigned 16-bit subtraction 3
TEST Compares the magnitudes of the values in the top and
middle nodes
3
MU16 Signed/unsigned 16-bit multiplication 3
DV16 Signed/unsigned 16-bit division 3
ITOF Signed/unsigned integer-to-floating point conversion 3
FTOI Floating point-to-signed/unsigned integer conversion 3
EMTH Performs 38 math operations, including floating point
math operations and extra integer math operations
such as square root
3
Ladder Logic Subroutine Instructions
JSR Jumps from scheduled logic scan to a ladder logic
subroutine
2
LAB Labels the entry point of a ladder logic subroutine 1
RET Returns from the subroutine to scheduled logic 1