Baumer GK473 - Manual (Page 16)

Manual_GK473_DeviceNet_EN.doc 16/31 Baumer IVO GmbH & Co. KG
04.05.11 Villingen-Schwenningen, Germany
7.1 Attribute 1: Autoscan SPA
Class Instance Attribute Access Rule
Name DeviceNet
Data type Default
Value
100 1 1 Get/Set
Autoscan SPA, Automated scan of the
RS485 Sub bus ON/OFF
BOOL 1
Default: 1= ON
During operation the gateway is performing automatic and cyclic scanning operations of all SPAs connected
to verify whether they are “in position”. Upon request this information is batched under a special command
for DeviceNet read-in. The AutoScan function relieves the CANopen master from proceeding cyclic SPA
scanning operations itself.
This operating mode is necessary to make the batched information objects (GK473 class Attribute 3..7)
provide valid data.
However, there might be situations where this is not desired
Several commands to the SPA are only valid for the time being until another command is received (for
example indicate SPA ID in the lower display line). The AutoScan attribute would make these commands
ineffective. Furthermore, the scanning procedure keeps the RS485 bus busy and consequently the
commands received from the DeviceNet master can be processed by the gateway faster with AutoScan off.