Alfa Laval ThinkTop - ThinkTop DeviceNet

4Technicalspecications
4.4ThinkTopDeviceNet
DeviceNet DeviceNet
DeviceNet
featur featur
featur
es es
es
and and
and
functionality functionality
functionality
Network Network
Network
size size
size
Up Up
Up
to to
to
63 63
63
nodes nodes
nodes
Networklength
Selectableend-to-endnetworkdistancevarieswithspeed
Baud Baud
Baud
Rate Rate
Rate
125Kbps
250Kbps
500Kbps
Distance Distance
Distance
500m(1,640ft)
250m(820ft)
100m(328ft)
Datapackets0-8bytes
Bustopology
Linear(trunkline/dropline);powerandsignalonthesamenetworkcable
Busaddressing
Peer-to-peerwithmulti-cast(one-to-many);multi-masterandmaster/slavespecialcase;polled
orchange-of-state(exception-based)
Systemfeatures
Removalandreplacementofdevicesfromthenetworkunderpower
Thebasictrunk-line/drop-linetopologyprovidesseparatetwisted-pairbusesforbothsignalandpowerdistribution.Athickorthincablecanbe
usedforeithertrunklinesordroplines.End-to-endnetworkdistancevarieswithdatarateandcablesize
Datarates
125Kbps250Kbps500Kbps
Thicktrunklength
500m(1,640ft)250m(820ft)100m(328ft)
Thicktrunklength
100m(328ft)100m(328ft)100m(328ft)
Maximumdroplength
6m(20ft)6m(20ft)6m(20ft)
Cumulativedroplength
156m(512ft)78m(256ft)39m(128ft)
Theend-to-endnetworkdistancevarieswithdatarateandcablethickness.
DeviceNetrequiresaterminatingresistortobeinstalledateachendofthetrunk:
-
121ohm
-
1%metalfilm
-
1/4watt
Terminatingresistorsshouldnotbeinstalledattheendofadropline,onlyatthetwoendsofthetrunk-line.
ForfurtherinformationpleaserefertotheDeviceNetStandard.
DeviceNet DeviceNet
DeviceNet
Featur Featur
Featur
es es
es
Devicetype
GenericMaster/scanner
N
Explicitpeer-to-peermessaging
N
I/OSlavemessaging
I/Opeer-to-peermessaging
N•BitstrobeN
Configurationconsistencyvalue
N
•Polling
Y
Faultednoderecovery
N
•Cyclic
N
Baudrates
125K,250K,500K
•Changeofstate(COS)
N
Configurationmethod
EDS
Theend-to-endnetworkdistancevarieswithdatarateandcablethickness.
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