Allen-Bradley ControlLogix Reference Manual

Chapter 4
CIP Axis Attributes
310 Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
Device-to-Controller connection at power-up is zero. This is an indication to the
controller that the drive has been power-cycled and the drive axis needs to be
homed to establish a machine reference position.
When configured for Absolute mode, the device initializes the feedback count
accumulator at power-up to the absolute feedback position value read from the
feedback device. When the feedback device's absolute position range is less than
the 32-bit signed integer representation of the feedback count accumulator, the
absolute position is sign extended to a 32-bit signed value. While there are many
Feedback Types that support Absolute startup, there are a few strictly incremental
types that do not: Digital AqB, and Sine/Cosine.
Some device vendors tie the Feedback Startup Method to the Feedback Type
selection. In these cases, an attempt by the controller to incorrectly configure the
Feedback Startup Method will generate a General Status error of Invalid Attribute
Value.
The default Feedback Startup Method value depends on the associated Feedback
Type according to the following table:
Feedback Type Default Feedback Startup Method
Digital AqB Incremental
Digital Parallel Absolute
Sine/Cosine Incremental
Hiperface Absolute
EnDat Sine/Cosine Absolute
EnDat Digital Absolute
Resolver Absolute
SSI Digital Absolute
LDT Absolute
Hiperface DSL Absolute
BiSS Digital Absolute
Integrated Absolute
SSI Sine/Cosine Absolute
SSI AqB Absolute
BiSS Sine Cosine Absolute
Tamagawa Serial Absolute
Stahl SSI Absolute

Allen-Bradley ControlLogix Specifications

General

Communication	EtherNet/IP, ControlNet, DeviceNet, DH+
I/O Capacity	Up to 128, 000 I/O points (varies by configuration)
Redundancy	Supported (with specific modules)
Programming Software	Rockwell Automation Studio 5000 Logix Designer
Operating Temperature	0°C to 60°C (32°F to 140°F)
Programming Languages	Ladder Logic, Function Block Diagram, Structured Text, Sequential Function Chart
Modularity	Yes
Certifications	UL, CE
Processor Type	Multiple options available, including standard, safety, and extreme environment processors
Power Supply	Multiple options available, including standard and redundant power supplies with various voltage ranges (e.g., 24V DC, 120/240V AC)