Messages

System Access and Message Routing

Messages from the third-party device A physical item with which you can interact, either directly or via Designer. can be targeted at any router In the sense of a lighting system, a router is an intelligent device whose software and hardware perform the tasks of routing and forwarding messages (data) from control devices to the control gear. A router contains two or more subnets. in the system.

If access has not been granted or has been blocked to a particular router, then communications can still be achieved to that router via any other router in the system, provided that you have the IP address Internet Protocol (IP) is a four-byte address that uniquely identifies the device to which it is assigned on the network. This address conforms to IPv4 standard. Each router broadcasts packets of information via IP. A router acts only upon instructions sent to its unique IP address. of another router and the third-party device is allowed access to it.

If a query message needs to be sent to a router for which access has not been granted, then the query message can be sent to any of the alternative routers, following this the response to the query – the query reply message – will be returned by the router to which the query was originally sent.

Message Format

Any message sent to, or received from, a router can be in either ASCII or raw binary form (see Command Format for more information).

Messages must not exceed the maximum length of 1500 bytes.  

The format of the data contained within messages is defined by the protocol.

A query reply message from the router will be in the same format as the query command message sent; for example, if a query message is sent in ASCII form, the reply will also be in ASCII.

Push Messages

Activate this option to enable routers to transmit internally generated messages to external HelvarNet clients.

To activate Push Messages:

1. In the Devices View, select the root node.

2. In the HelvarNet section of the Properties view (see screenshot below), set Push Messages to True.

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Related Topics

• Configuration Command Descriptions

• Configuration Command Table

• Command Format

• Control Command Descriptions

• Control Command Table

• Query Command and Reply Descriptions

• Query Reply Tables

• Query Commands Table

• HelvarNet Overview

• Error/Diagnostic Messages

• HelvarNet Routing Entries