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1DESCRIPTION
The LonWorks driver allows the FieldServer to transfer data to and from devices using LonWorks protocol. The FieldServer can emulate either a Server or Client. The
2DEFINITIONS
2.1NV Updates/Polls
On LonWorks networks, information is transferred using Network Variable Updates and Network Variable Polls. The Client requests Network Variables from the Server using Network Variable Polls and Network Variable Updates occur when a Client sends Network Variables to a Server.
2.2Network Management
The FieldServer is able to set its own Domain, Subnet and Node ID at
2.2.1 LonWorks - Program ID Calculation (SPID)
Network management tools use the Program ID to identify the different applications running on each device. Two devices on a network may have the same Program ID only if they have identical application/configurations
The Program ID for the FieldServer consists of a fixed and a variable field (XX in the Program ID below)..
90:00:95:47:1E:02:04:XX
The fixed part does not change for different configuration files or for different LonWorks driver versions. The variable part XX, which is also defined as the Model or Revision number, does however change.
The variable part is calculated at
It is possible though very unlikely that through a change in LonWorks driver and/or configuration file, the program IDs calculates out identical to another combination of driver and configuration. If this is the case with two FieldServers on the same network that run different configurations, one of these devices may fail to commission properly.
The following configuration can be used to force the SPID.
Connections |
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Adapter | ,Protocol | ,SPID |
Lonworks | ,Lonworks | ,80:00:95:48:50:02:04:01 |
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