Usually the Express Communications Wizard is
sufficient to set up your communications. However, if you need to
manually configure communications, do the following:
Define an I/O Server in the
I/O Server Properties form.
This defines the name of the CitectSCADA server that the I/O Device
will communicate with.
Complete the Boards Properties. This defines which
board (on your CitectSCADA
computer) to use to communicate (mother board, network card, serial
board or a PLC communication card). Dial-up remote I/O Devices need
to use a COMx board.
Complete the Ports Properties. Often boards have
multiple communication ports and you need to specify the port to
use. Some equipment can have several logical (virtual) ports
assigned to the one physical port. If using modems, you need to
specify a unique port name for each and -1 for the port number. You
need to also specify the communication parameters and any special
behavior of that port.
Complete the I/O Devices Properties. This
defines the I/O Device that CitectSCADA is talking to, by
specifying the address. The protocol is also defined at this
Run the Computer Setup Wizard to
complete configuration. This allows you to define your CitectSCADA computer as the I/O Server
defined above. This is usually done after you compile the
If using dial-up remote I/O
Devices, you need to complete the Modems dialog box. This defines
how CitectSCADA uses a
modem to communicate with remote I/O Devices.
Note: If there is no data to read or write,
CitectSCADA will not
communicate with an I/O Device regardless of whether it is defined
or not. You need to create a variable tag and use it before
CitectSCADA will do a read
request. For example, use an integer variable to display a number
on a page.