NDC BETA LaserMike LaserSpeed Pro 8500-4, Instruction Handbook Manual

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8-8 LaserSpeed Pro 8500-4 Instruction Handbook: Ethernet Communication
8.9.3 UDP Discovery Beacon
The LS8500-4 supports a protocol that allows a host to find all LaserSpeed gauges connected to a network.
This protocol is initiated by a host sending a UDP broadcast message, referred to as a Discovery Beacon.
Each LaserSpeed that receives the message will respond to it.
Important: If the device transmitting the UDP discovery beacon is on one subnet and the LaserSpeed Pro
gauge is on another, routers between the subnets typically do not forward on UDP broadcast packets and so
the LaserSpeed Pro will not be found under these conditions.
The discovery beacon has a configurable format that specifies what information should be in the response
message. The message is composed of a list of identifiers, each one specifying a value that is being re-
quested. The LaserSpeed's response consists of a list of values, each one giving the value of a requested
parameter. The values listed in the response are in the same order as the identifiers are listed in the discov-
ery beacon. If an identifier in the discovery beacon is not recognized, then it is omitted from the response. If
an identifier is sent out in the beacon, but a gauge omits it from its response, it should be assumed that the
gauge does not recognize the identifier.
8.9.4 Discovery Beacon Format

Protocol: UDP Broadcast

Host Port: Any

Destination Port: 10003
12
blmfind_v1.0
0 1-12
n
13
id(0)
14
id(1)
15
id(2)
16
id(3)
17
id(4)
18
id(n)
14+n Message Byte
Value
(text string)
Byte Description
0 The length of the protocol version. This byte should always be 12.
1-12 The protocol version string. This string should be set to "blmfind_v1.0"
13 n specifies the number of identifiers in the list.
14 to
14+n Each byte specifies the identifier of a value that should be returned in the
beacon response.