122 Rockwell Automation Publication 1756-RM100F-EN-P - October 2018
Chapter 6 Instruction Execution
Instruction Error and
Fault Changes
This section describes the instruction error and fault changes that apply to the
following:
• Subscript Expressions
• TRN Operator and Math Status Flags
• Math Status Flags are Valid Only in One Rung
• AVE and STD Instruction Accuracy
• BTD, FAL, FSC, and CMP No Longer Generate Math Status
• Math Status Flags Not Permitted in Structured Text
• Minor Fault on Overflow
• Manually Set Math Overflow
• TOD Instruction Flags and Math Status Flags
• Add-On Instructions Do Not Propagate Math Status Flags
• Subroutines Do Not Affect Math Status Flags
• Carry Flag
• Store NAN in an Integer
• Compare NAN Values
IMPORTANT Manually determine the impact to your application and correct accordingly.
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