74 Rockwell Automation Publication 1756-RM093J-EN-P - April 2018
Appendix A Safety Instructions
Additional Resources
Refer to these publications for more information.
Math/
Compute
ADD Add Add two values 14
SUB Subtract Subtract two values 14
MUL Multiply Multiply two values 14
DIV Divide Divide two values 14
MOD Modulo Determine the remainder after one value is divided by a second value 14
SQR Square Root Calculate the square root of a value 14
NEG Negate Take the opposite sign of a value 14
ABS Absolute Value Take the absolute value of a value 14
I/O
GSV
(2)
Get System Value Get controller status information 14
SSV
(2)
Set System Value Set controller status information 14
(1) The length operand must be a constant when the COP instruction is used in a safety routine. The length of the source and the destination must be the same.
(2) Refer to the GuardLogix Controllers User Manual, publication 1756-UM020
, for special considerations when using the GSV and SSV instructions.
(3) The event instruction will trigger a scan of the standard task.
(4) Available in this version and later.
Table 13 - Ladder Logic Safety Instructions
Type Mnemonic Name Purpose RSLogix 5000
Version
(4)
Resource Description
GuardLogix Safety Application Instruction Set Reference
Manual, publication 1756-RM095
Provides more information on the safety application
instructions
Logix5000 Controllers General Instructions Reference Manual,
publication 1756-RM003
Contains detailed information on the Logix
instruction set
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