Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Uživatelský manuál stáhnout pdf (Strana 111)

Rockwell Automation Publication 20COMM-UM015B-EN-P - July 2013 111

Using Explicit Messaging Chapter 6

The following table identifies the data that is required in each box to configure a

message to write a single parameter.

Configuration Tab Example Value Description

Message Type

Service Type

(1)

Service Code

(1)

Class

Instance

(2)

Attribute

Source Element

Source Length

CIP Generic

Parameter Write

10 (Hex.)

f (Hex.)

140 (Dec.)

1 (Hex.)

Accel_Time_1

(4)

Used to access the Parameter Object in the adapter.

This service is used to write a parameter value.

Code for the requested service.

Class ID for the DPI Parameter Object.

Instance number is the same as parameter number.

Attribute number for the Parameter Value attribute.

Name of the tag for any service data to be sent from the scanner or bridge to the adapter/drive.

Number of bytes of service data to be sent in the message.

Communication Tab Example Value Description

Path

(3)

My_PowerFlex_Drive The path is the route that the message will follow.

Tag Tab Example Value Description

Name Single_Write_Message The name for the message.

(1) The default setting for Service Type is ‘Custom’, enabling entry of a Service Code not available from the Service Type pull-down menu. When choosing a Service

Type other than ‘Custom’ from the pull-down menu, an appropriate Hex. value is automatically assigned to the Service Code box which is dimmed (unavailable).

(2) Only drive parameters (Port 0) can be written to using Parameter Object Class code 0x0F. To write to a parameter of a peripheral in another port, use DPI Parameter

Object Class code 0x93 (see page 123

(3) Click Browse to find the path, or type in the name of the device listed in the I/O Configuration folder.

(4) In this example, Accel Time 1 is a 16-bit parameter requiring the tag Data Type field to be set to ‘INT’ when creating the controller tag. If the parameter being

written to is a 32-bit parameter, the tag Data Type field must be set to ‘DINT’. Also, the Source Length field on the Message Configuration screen must correspond

to the selected Data Type in bytes (for example, 4 bytes for a DINT or a REAL). When using a PowerFlex 700S drive, Accel Time 1 is a floating point number requiring

the Data Type field to be set to ‘REAL’ when creating the controller tag. See the drive documentation to determine the size of the parameter and its data type (16-

bit or 32-bit integer or REAL).

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