12.1.5 Local Monitoring With Host Computer
The local monitoring with host computer method consists of connecting a host
computer running the Hydran Host software or Perception software to a Hydran 201i
System or a network using computer’s local RS-232 serial port or a USB port, depending
on the communication protocol set in the network of Hydrans; for Hydran protocol use
Hydran Host, or ModBus protocol use Perception. In case the 201Ti network is set to
ModBus, then the connection from the host computer to the network can be established
either using an USB to RS-485 converter and connect to the first H201Ti in the network,
directly on the Supervisory Link port, or using the network solution with Hydran 201Ci
Controller.
Note: An RS-232 or USB communication port is available on each Hydran 201Ci
Controller.
Both the Hydran Host software and Perception software allow various tasks, among
which:
• Data reading (gas level, hourly and daily trends, etc.)
• Immediate detection of all alarms and their acknowledgment by the user.
• Modification of alarm settings and other parameters.
• Historic data upload from one or several Hydran 201Ti’s.
For details, see the Hydran Host or Perception Software Manuals.
Note: Other software can be run on the host computer at the same time as the Hydran
Host software, respectively Perception software. Hydran Host cannot be used in
conjunction with a network of H201Ti set to ModBus protocol, and Perception software
cannot be used in conjunction with a network of H201Ti set to Hydran protocol.
1.1.1.16 Method Benefits
The advantages of this method are as numerous as important:
• Gas level monitoring can be fully integrated to the transformer or station
monitoring.
• Cabling is minimized.
• Reliability and performances are greater than those of methods based only on
alarms and analog outputs monitoring.
• The use of networked electronic intelligent devices (such as the Hydran 201Ti
and the Hydran 201Ci) is a mature technology with an extensive future.
12.1.6 Remote Monitoring With Host Computer
The remote monitoring with host computer method consists of connecting a host
computer running the Hydran Host software to a Hydran 201i System or to one or
several network(s) of Hydran 201i Systems located at different locations, through a
telephone system and a modem link.
Remote monitoring offers the same features and benefits as local monitoring, plus:
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