Campbell RF410 Bedienerhandbuch PDF herunterladen (Seite 70)

PakBus Networking Guide

ROUTER

CR510PB

RF400 Series

PakBus

Address = 20

CR205

PakBus

Address = 30

CR10XPB

(P190 to address 30)

RF400 Series

PakBus Address = 10

strong rf link

long, direct path

weak rf link

Neighbor Filter

Potential Neighbor:

Neighbor Filter

Potential Neighbors:

FIGURE 21. Neighbor Filter Force a Path through Router

7.6 Concurrent Communications

PakBus OSs allow dataloggers to simultaneously communicate with multiple

peripherals using interleaved packet transfers. With an SDC peripheral, packet

arbitration takes advantage of the synchronous device’s addressed enabling. In

the case of a modem enabled peripheral, the datalogger uses a PakCtrl level

“pause”/”finished” exchange to momentarily pause the M.E. peripheral’s link

while another (non-M.E.) peripheral transfers a packet.

As with mixed-array OSs, only one M.E. peripheral can be connected to a

PakBus datalogger. Several SDC peripherals can be connected and

communicating at once. For example, a CR10XPB can connect to: an SC32B

(M.E.), an RF400 (CSDC 7), an MD485 (CSDC 8) and the CR10KD (SDC 6).

They can all be communicating at the same time.

Dual LoggerNet Servers

It is possible to configure two servers in a network, each displaying real time

data on their Numeric Displays. They roughly alternate receiving records from

the datalogger. One server can ring up the datalogger while another sever is

already connected. The key to getting the second server set up is to make sure

that in Options \ LoggerNet Settings (Toolbar) its PakBus Computer ID is set to

a different ID than the first server. To take effect, the ID must be changed

before building the device map. In order to monitor Input Locations in Numeric

Display, once you connect with the second server, it is necessary to Get Table

Definitions by highlighting the datalogger in Setup, clicking on the Data Files

tab, and clicking the Get Table Definitions button.

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