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Class attributes, Instance attributes, Class attributes instance attributes – Rockwell Automation 25-COMM-D PowerFlex 525 DeviceNet Adapter User Manual

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Rockwell Automation Publication 520COM-UM001A-EN-E - April 2013

105

DeviceNet Objects

Appendix C

Class Attributes

Instance Attributes

Attribute ID

Access Rule

Description

1

Read

Revision

2

Read

Maximum Instance

3

Read

Number of Instance

100

Read/Write

Timeout

Attribute ID

Access Rule

Name

Data Type

Description

1

Get

Bad Flag

BOOL

If set to 1, then attribute 4 may contain invalid data.
0 = good
1 = bad

2

Get

Direction BOOL

Direction of data transfer
0 = Produce Register (drive to network)
1 = Consume Register (network to drive)

3

Get

Size

UINT

Size of register data in bits

4

Conditional

(1)

(1) The access rule of Set is optional if attribute 2, Direction = 1. If Direction = 0, the access rule is Get.

Data

Array of Bits

Data to be transferred

IMPORTANT

Setting the “Data” instance attribute can be done only when the Control
Timeout (class attribute 100) has been set to a non-zero value.

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