Echelon ISI - Manual (Page 116)

ISI Programmer’s Guide 114
Byte Offset Data Type Field Name Note
2 unsigned [6] Did Domain ID. This field is
always 6 bytes long; the
number of significant bytes
is contained in the
DIDlength field
8 unsigned [6] NeuronId Neuron ID of the DAS, used
for matching DIDRM
messages with DIDCF
messages.
14 unsigned DeviceCountEst Estimated device count used
for throttling periodic
messages. The device count
is an approximation and will
typically be larger than the
actual network size.
15 unsigned ChannelType The least performing
channel ID observed.
IsiDidrq Structure
Defines a domain request message.
Byte Offset Data Type Field Name Note
1 unsigned [6] NeuronId Neuron ID of the requesting
device.
7 unsigned Nuid Non-unique device ID. This ID
is a random number between 0
and 255 that may be used by a
DAS to approximate the number
of devices within earshot. This
number does not need to be
unique between devices, but a
statistic distribuition of Nuid
values is required.
IsiDirection Enumeration
Specifies the direction of the primary network variable on offer in a CSMO.
IsiEvent Value Note
isiDirectionOutput 0 Indicates the network variable is an
output NV.
isiDirectionInput 1 Indicates the network variable is an
input NV.