Rockwell-automation 1760-DNET Pico DeviceNet Communications Module Use Manual de usuario descargar pdf (Pagina 30)

Publication 1760-UM003A-EN-P - September 2005

4-6 DeviceNet Functions

DeviceNet Object

The DeviceNet object instance is used to configure the

communication module and to define the physical environment. The

Service Codes used for the Identity Object also apply in this case.

Pico Object

The Pico object can be used to access Pico/GFX functions via the

DeviceNet communication bus . The table below shows the attributes

Object Address Function Access

Class ID Instance ID Attribute ID Service Code

hex

Table 4.6 Table 4.5

Table 4.6 DeviceNet Object Instance Attribute IDs

Attribute

Access Name Description Size

(byte)

1 Read/

Write

MAC ID The MAC ID represents the network

address of a network node. It can be read

and set for the module via the DeviceNet

fieldbus by means of this attribute. Range

of values: 0 to 63

dec

. (see DeviceNet

Setting the Slave Address on page 3-1)

2 Read/

Write

Baud rate This attribute can be used to read/set the

data transfer rate for communication

functions. Range of values: 0 to 2, 125 to

500 kbps (see Data Transfer Rates –

Automatic Baud Rate Recognition on page

2-4).

3 Read/

Write

BOI (Bus-Off

interrupt)

This attribute can be used to define the

reaction to a Bus-Off event (CAN-specific).

4 Read/

Write

Bus-Off

counter

This values shows how often a Bus-Off

event has occurred. Range of values: 0 to

255.

Object Address Function Access

Class ID Instance ID Attribute ID Service Code

hex

Table 4.7 Table 4.8

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 167 168

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