124 Rockwell Automation Publication 1756-RM100F-EN-P - October 2018
Chapter 6 Instruction Execution
TRN Operator and Math Status Flags
TRN operators always produce a 32-bit integer value. When attempting to
store that value into a destination too small to hold it, an overflow condition
occurs.
While a 5570 or 5370 controller causes a minor overflow fault, it does not set
the overflow flag.
CPT instructions that use a TRN operator now produce correct math status.
Mitigation
N/A
Language Affected
Ladder Logic (RLL) Yes
Struc tured Text (ST) Yes
Function Blocks (FBD) No
Sequential Function Chart (SFC) No
5580/5380 Controllers 5570/5370 Controllers
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