Rockwell-automation 20G PowerFlex 755 Drive Embedded EtherNet/IP Adapt Manual de usuario descargar pdf (Pagina 94)

94 Rockwell Automation Publication 750COM-UM001E-EN-P - October 2013

Chapter 6 Using Explicit Messaging

ControlLogix Controller

Examples

For supported classes, instances, and attributes, see Appendix C, EtherNet/IP

Objects.

ControlLogix Controller Example Ladder Logic Program to Read a

Single Parameter

A Get Attribute Single message is used to read a single parameter. This read

message example reads the value of the 32-bit REAL (floating point) parameter

007 - [Output Current] in a PowerFlex 750-Series drive.

Table 5 - Example Controller Tags to Read a Single Parameter

Figure 20 - Example Ladder Logic to Read a Single Parameter

TIP

To display the Message Configuration dialog box in RSLogix 5000 software, add

a message instruction (MSG), create a new tag for the message (Properties:

Base tag type, MESSAGE data type, controller scope), and click the button

in the message instruction.

IMPORTANT

The explicit messaging examples in this section can be performed with RSLogix

5000 software, any version—or Studio 5000™ Logix Designer application,

version 21.00 or later.

IMPORTANT

The read and write messaging examples in this section are for Device

parameters which use Class Code 0x93. For Host parameters, use Class Code

0x9F and format the rest of the message in the same way as these examples.

The Message Configuration has a Service Type of ‘Parameter Read’ which is

Class code 0x0F, Parameter Object. Parameter Object is not supported in

PowerFlex 750-series drives.

Operand Controller Tags for Single Read Message Data Type

XIC Execute_Single_Read_Message BOOL

MSG Single_Read_Message MESSAGE

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 189 190

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Rockwell-automation 20G PowerFlex 755 Drive Embedded EtherNet/IP Adapt Manual de usuario Pagina 94