Campbell RF410 Manual de Instruções descarregar pdf (Página 29)

PakBus Networking Guide

3.2.1 LoggerNet Direct (Approach 1)

LoggerNet communicates with each datalogger to collect historic data, resulting

in separate files for each datalogger in the network. Each remote datalogger can

have its own collection schedule.

3.2.2 P190 Datalogger (Approach 2)

A datalogger plays the role of concentrator using P190 instructions to obtain

data values from the remotes. It processes the data and puts it into its own final

storage for LoggerNet to collect to one file. This approach ignores historic data

in the remote dataloggers.

For large networks this approach maximizes the speed of collection.

Dataloggers can be collected as quickly as remote response allows.

3.2.3 P193 Datalogger (Approach 3)

The P193 assigns each remote an exclusive time slot to send data values.

Thereafter, data transfers are initiated by the remote datalogger. This approach

ignores historic data in the remote.

This reduces remote power budgets because radios only power up during their

own time slot. However, P193 throughput and collection flexibility is less than

with the P190 because of the fixed time slots.

3.3 Communications Choices

Many CSI communications devices support PakBus communications. A few do

not.

3.3.1 Support PakBus Communications

• Wired

SC32B

MD485 multidrop RS-485 communications

SRM5A short range asynchronous modems

• Phone

COM210

COM310

• Radio

RF400 Series 100 mW spread spectrum radio communications

MCC-545B 100 Watt meteor burst communications

Freewave 1 Watt spread spectrum communications (non-CSI device)

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Campbell RF410 Manual de Instruções Página 29