Rockwell Automation 1760-DNET Pico DeviceNet Communications Module User Manual - Manual (Page 32)

Publication 1760-UM003A-EN-P - September 2005
4-8 DeviceNet Functions
Change of State I/O Connection
Table 4.8 Service Code
Service Code Value Service Name Description
0E
hex
Get_Attribute_Single This service can be used to
fetch the value of a selected
attribute from the
communication module.
10
hex
Set_Attribute_Single This service can be used to
set a selected attribute in
the device.
32
hex Extended access
(1)
(1) Additional parameters are “Time”, “Image data” and “Function block”. Addressing of the parameters is Pico
specific and is described in chapters 5 – 7 in detail.
Extended access is implemented via explicit message transfer. This transfer protocol allows the exchange of
control data. Further information about the transfer protocol can be found in section “DeviceNet
Communication profile” on page 9.
This service can be used to
address the supplementary
parameters
(1)
of the control
relay:
Table 4.9 Diagnostics Data: 2 Byte
Bytes Meaning Value Meaning
0 Pico status
(attribute ID 1) 00
hex
Static value.
1 Coupling module
status (attribute ID
2) 00
hex
The basic unit is
connected to the
1760-DNET gateway
via Pico-LINK.
04
hex
The basic unit is
either switched off
or disconnected
from the
1760-DNET gateway
via Pico-LINK.
TIP
When communication between the basic unit
Pico/GFX and the expansion unit 1760-DNET goes
down, a corresponding error code will be generated
in the third data byte. Furthermore, the Rx/Tx data of
the gateway will be transferred with the value 00hex.