Campbell LoggerNet, Инструкция по эксплуатации

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Section 4. Setting up Datalogger Networks
Hardware Tab, Advanced
Extra Response Time – In this field, specify the additional time that
LoggerNet should delay before terminating the communications link if there is
no response from the generic modem. Additional time may be needed in
instances where the communications link is noisy or network traffic is heavy.
Maximum Packet Size – Data is transferred in “chunks” called packets. For
most devices the default value is 2048 byes. The value entered in this field can
be changed in 32 byte increments. If a communications link is marginal,
reducing the packet size may improve reliability.
Delay Hangup – The amount of time, in seconds and milliseconds, that
LoggerNet should delay before hanging up the link to the device. If a new
command to the device is issued before the delay has expired, communication
will not be terminated.
Modem Tab
Dial script – Enter the complete ASCII text string (initialization commands,
telephone number, etc.) that is required to set up the device for communication.
End script – Enter the reset string that should be sent at the end of
communication with this device. Care should be taken to ensure that the script
puts the device in an off-line state.
Half Duplex – Select this check box to enable half-duplex communication.
This means that communication will take place in one direction at a time;
therefore, it will significantly slow the communication speed.
Raise DTR – Select this check box to set the DTR (data terminal ready) line
high. This tells the remote device that the computer is ready to receive data.
RTS CTS use – Determines what mode to use for Request to Send/Clear to
Send functions:
•
Hardware handshaking will be enabled – The computer uses the RTS and
CTS hardware lines to control the flow of data between the computer and
the remote device. Most newer modems support hardware flow control.
•
The RTS line will be raised – Sets the RTS (ready to send) line high. This
tells the remote device that the computer is ready to send data.
•
The RTS line will be lowered – Sets the RTS line low.
4.2.4.17 PakBusPort
A PakBusPort must be added to the network map if you want to add a
datalogger capable of PakBus communication (CR510-PB, CR10X-PB,
CR23X-PB, CR1000, CR3000, CR800, or CR200 Series). PakBus is a packet-
based communications protocol developed by CSI for its dataloggers and some
communications peripherals. PakBus offers a robust, efficient means of
communication within larger datalogger networks, and allows routing of data
from one datalogger (or other PakBus device) to another within the network.
All PakBus devices within the network are assigned a unique address.
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