Allen-Bradley PowerFlex 755T User Manual

Rockwell Automation Publication 750COM-UM009A-EN-P - May 2017 91
Using the I/O Chapter 4
Using Datalinks
A datalink is a mechanism that is used by PowerFlex drives to transfer data to
and from the controller. Datalinks allow a drive parameter value to be read or
written to without using an explicit message. When enabled, each datalink
occupies one 32-bit word in a ControlLogix controller.
The following rules apply when using PowerFlex 755T drive datalinks:
• The target of a datalink can be any Host parameter, including host
parameters of a peripheral. For example, drive 10:1915 - [VRef Accel
Time 1] can be the target of the built-in EtherNet/IP interface and any
or all option modules that are installed in the drive.
•The settings of 0:321…336 - [DL From Net 01…16] and
0:340…355 - [DL To Net 01…16] determine the data that is passed
through the datalink mechanism of the drive.
• When an I/O connection that includes datalinks is active, those
datalinks being used are locked and cannot be changed until that I/O
connection becomes idle or inactive.
• When you use a datalink to change a value, the value is not written to
the nonvolatile storage (NVS). The value is stored in volatile memory
and lost when the drive loses power. Use datalinks to change the value of
a parameter frequently.
Datalinks for PowerFlex 755T peripherals are locked when the peripheral has
an I/O connection with a controller. For example, the built-in EtherNet/IP
interface on PowerFlex 755T drives only, and option modules such as an
encoder or a communication module. When a controller has an I/O
connection to the drive, the drive does not allow anything that could change
the makeup of the I/O connection in a running system. For example, a reset to
defaults and configuration download. The I/O connection with the controller
must first be disabled to allow changes to the respective datalinks.
Depending on the controller being used, the I/O connection can be disabled
by doing the following:
• Inhibiting the module in Studio 5000 or RSLogix 5000 environment
• Putting the controller in Program mode
• Disconnecting the drive from the network

Allen-Bradley PowerFlex 755T Specifications

General

Altitude	Up to 1000 m (3280 ft) without derating
Power Range	0.75-2500 kW
Output Voltage	0…Rated Input Voltage
Control Methods	Sensorless Vector Control
Communication Options	EtherNet/IP, DeviceNet, ControlNet, PROFIBUS DP, PROFINET, EtherCAT
Enclosure Type	NEMA/UL Type 1, NEMA/UL Type 12
Operating Temperature	-20°C to 50°C (-4°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Relative Humidity	5…95% noncondensing
Input Voltage Range	200-240V AC, 380-480V AC, 500-690V AC

Summary

User Manual

Important User Information

Safety Warnings and Precautions

Provides critical safety information, including warnings for hazardous environments, personal injury, and equipment damage.

Chapter 1: Getting Started

Setup and Required Components

Details physical components, features, dual Ethernet ports, required equipment, and Ethernet switch selection.

Safety Precautions for Setup

Outlines essential safety measures to be followed during the initial setup and operation of the drive.

Chapter 2: Configure the Interface

IP Address Configuration Methods

Explains various methods for setting the IP address, including rotary switches, BOOTP, DHCP, and interface parameters.

Network Connection and Initial Power-Up

Covers connecting the interface to the network and the steps for applying power and checking status indications.

Key Drive Parameter Configuration and Fault Actions

Guides on configuring drive parameters, communication hierarchy, and fault actions for network communication.

BOOTP and DHCP Server Configuration

Details configuring IP addresses, subnet masks, and gateway addresses using BOOTP or DHCP servers.

Chapter 3: Configuring the Drive in a Logix System

Establishing Network Communication

Outlines establishing communication between a computer, network, and controller using RSLinx Classic software.

Adding Controller, Bridge, and Drive to I/O Configuration

Describes adding the ControlLogix controller, bridge, and drive to the I/O configuration in Studio 5000.

Chapter 4: Using the I/O

I/O Messaging and Control Concepts

Explains I/O messaging, ControlLogix I/O image structure, and the use of logic command/status and reference/feedback.

Datalink Functionality for Data Transfer

Explains using datalinks for transferring parameter values to/from the controller without explicit messages.

Ladder Logic Program Examples

Provides information on ladder logic program examples for drive control using AOPs.

Chapter 5: Using Explicit Messaging

Performing Explicit Messaging Operations

Describes the five basic events in the Explicit Messaging process for configuring and monitoring devices.

Reading and Writing Parameters via Explicit Messaging

Provides ladder logic programs and formatting for reading and writing single/multiple drive parameters using explicit messages.

Chapter 6: Troubleshooting

Interface Diagnostic Items and Status Indicators

Explains viewing diagnostic items and understanding drive/interface status indicators for troubleshooting.

Specific Indicator Troubleshooting

Details troubleshooting for ENET, LNK1, and LNK2 status indicators, covering causes and corrective actions.

Appendix A: Status Indicators

ENET Network Connection Status Indicator

Describes the red/green ENET status indicator and its meanings for network connection status.

LINK Status Indicators for Network Activity

Explains LNK1/LNK2 indicators for Ethernet connectors showing network link and activity.

Appendix B: Specifications

Communication and Regulatory Specifications

Details communication specs like protocol, data rates, and regulatory compliance information for the adapter.

Appendix C: Interface Parameters

Interface Parameter Organization and List

Explains parameter organization, viewing methods, and provides a detailed list of Port 0 parameters.

Appendix D: EtherNet/IP Objects

EtherNet/IP Object Definitions and Data Types

Defines EtherNet/IP objects like Identity, Assembly, and DPI Parameter, along with supported data types.

Appendix E: Logic Command/Status Words

Logic Command and Status Words Reference for Drives and Bus Supplies

Defines bit assignments for logic commands and status words for PowerFlex 755T drives and bus supplies.

Glossary

Key Definitions for Network Communication and Configuration

Defines terms like Adapter, ADC, BOOTP, DHCP, EtherNet/IP Network, Explicit Messaging, and IP Addresses.

Glossary of Operation, Protocol, and Data Terms

Defines terms for operation, protocols, and data like Fault Action, Gateway, HIM, Logic Command/Status, and Duplex.