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Comms Database Server
Devices are held in databases and the databases are accessed via the Database Server. It
is possible to connect to remote database servers, and access their databases and devices.
Similarly, connections can be made to remote comms servers to retrieve data from their de-
vices. See
System Setup
The system can be set up two ways.
Modbus Capabilities:
The above specifications should be used as a guideline, because factors such as network
speed and reliability could impact performance.
43-TV-25-35 GLO Iss.4 Dec 06 UK
A5E01001767-04
Comms Database Server
This is the database icon which will appear in the bottom right of the screen
to show that the SIREC D - Server software is running with the Database
server active. Loads automatically with SIREC D - Server.
Figure 8.3, "Data Logging and Transfer," on page
1. For customers who are setting up in preparation for the arrival of their devices. Using
SIREC D - Server
the
device(s) and configure each device for logging using the comms server. When the
devices are in place and connected check the IP address (for Ethernet devices only)
and the device ID is correct.
2. For larger networks - Set up the hardware first noting each devices ID and IP address.
Use the comms server software to set up the devices on a database and configure log-
ging for each device. The devices will need to be set up on the
software before the connections can be tested and become active.
1. The Comms Server is a Modbus master. It has no slave capability.
2. The maximum speed of data transfer over Modbus is 1 (one) reading per second / per
channel
3. The maximum speed of data logging of realtime Modbus data is 1 (one) reading per
second/ per channel.
4. The maximum number of devices depends on whether the connection is serial or ether-
net.
• On the serial port, there is a physical limit of 31 devices. The Modbus comms can sup-
port anywhere between 4 and 10 devices at a rate of 1 reading per second depending
on the complexity of the recorder configurations. As the rate is decreased from 1 (one)
reading per second, the number of supported devices increases.
• On the Ethernet connection, the current physical limit is 247 recorders talking Modbus
due to a requirement that the Comms Server must have a unique ID for each device in
the network. Additional
tocol could be supported on the network as long as their device IDs remain unique.
With Modbus connection, anywhere between 24 and 64 devices are supported at a
rate of 1 reading per second, again depending on the complexity of the device configu-
rations. As the rate is decreased, the number of devices supported increases.
5. The maximum number of pens supported at once per second for a given device is 32.
Up to 64 pens supported at once every 5 seconds. Then all 96 pens at once every 10
SIREC D400
seconds for the
and Comms Server software, create a database for the
SIREC DS,DH and DM
recorder.
176.
SIREC D - Server
recorders using the Trendbus pro-
197
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