Allen-Bradley CompactLogix 5380 User Manual

132 Rockwell Automation Publication 1756-RM100F-EN-P - October 2018
Chapter 6 Instruction Execution
Carry Flag
Only the ADD and SUB instructions that specify integer operands can affect
the carry bit. This lets you perform chain calculations to support larger
(unsupported) data types (Add low, Add_with_carry high).
The carry flag is limited to only those operations that are relevant. This
simplifies its use and that of math status flags in general.
This implementation affects all instructions that can set math status flags.
Mitigation
Look for references to s:c in the user project and verify that the logic functions
as intended.
Language Affected
Ladder Logic (RLL) Yes
Struc tured Text (ST) Yes
Function Blocks (FBD) No
Sequential Function Chart (SFC) Yes
(1)
(1) Only affects embedded Structured Text.
5580/5380 Controllers 5570/5370 Controllers
Use of the ADD and SUB operators has no effect on the
carry bit.
Only ADD and SUB instructions with integer operands
can affect the Carry flag.
Many math instructions can set the Carry bit.

Allen-Bradley CompactLogix 5380 Specifications

General

Series	CompactLogix 5380
Number of EtherNet/IP ports	2
Power Supply	24V DC
Communication Ports	EtherNet/IP, USB
Operating Temperature	0 to 60 °C (32 to 140 °F)
Dimensions	Varies by model
Weight	Varies by model

Summary

Chapter 1 Before You Begin a Migration

New and Future Features

Compares features across controller families, detailing availability in Studio 5000 Logix Designer versions.

Chapter 2 Replacement Considerations with ControlLogix 5580 and GuardLogix 5580 Systems

Chapter 3 Replacement Considerations with CompactLogix and Compact GuardLogix Systems

Product Comparison

Compares technical specifications of CompactLogix 5380 controllers against 5370 models and Compact GuardLogix 5380 against 5370 models.

EtherNet/IP Modes

Explains Dual-IP and Linear/DLR modes supported by 5380 controllers and their configurations.

Chapter 4 Replacement Considerations with Safety Applications

Perform Risk Assessment

Outlines the process of risk assessment and reduction as part of a proper safety strategy, referencing IEC-61508.

Safety Signature

Explains the safety signature's role in uniquely identifying project safety logic, data, and configuration, and its requirements.

Safety Network Number

Defines the Safety Network Number (SNN) and its use in uniquely identifying CIP Safety ports within a routable safety network.

Produce/Consume Safety Tags

Details how GuardLogix 5580/5380 controllers handle produce/consume safety tags as unicast or multicast.

Safety Application Conversion

Guides on converting safety applications when importing projects or changing controller types, noting SIL project changes.

Replace Producer Controller

Addresses potential consumer controller faults when a producer controller's safety partner is missing or changed.

Chapter 5 Standard Application Conversion

Converting Logix Designer Projects

Explains project conversion when opening projects in newer Logix Designer versions and optimizing memory structures.

Produce and Consume Tags

Provides techniques for establishing produce/consume tag communication and proper configuration for multicast tags.

Motion Applications

Compares integrated motion capabilities between controller families, noting support for EtherNet/IP and axis types.

Chapter 7 Diagnostics and Status Indicators with ControlLogix Systems

Chapter 8 Diagnostics and Status Indicators with CompactLogix Systems

Controller Status Display and Indicators

Details the 4-character display and status indicators for 5380 controllers, noting differences from 5370 controllers.