CTI 2500 Installation and Operation Guide V2.8
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Data Access Port (TCP Port 4450/1505)
To use the Data Access port, you should connect to TCP port 4450. To provide compatibility
with installations using the CTI 2572 and 2572-A, you may also connect to the Data Access port
using TCP port 1505. A total of three concurrent TCP connections to either port 4450 or port
1505 are allowed. For example, you could have two connections to port 4450 and one
connection to port 1505. UDP is not supported.
The Data Access port is intended for use with HMI (Human Machine Interface) and SCADA
(Supervisory Control and Data Access) software. Since the Data Access Port uses the same
CAMP protocol used by CTI 2572 and 2572-A modules, drivers are available for most popular
SCADA software packages.
Port 4450/1505 can also be used with network-capable programming software when you want
to allow the user program to be displayed but not modified. By default, the Data Access port will
reject commands that attempt to alter the User Program, returning a “port lockout” error.
Some legacy network programming interfaces, such as APTNET, support only Port 1505. If you
need to use TCP Port 1505 as a full function programming port (allowing programs to be
modified), you can set the Programming Port switch as described in Section 2.3.
Caution
When you choose to use Port 1505 as a full function programming port, there is no means to
prevent two users from concurrently modifying the User Program, since more than one
programming connection to the Ethernet port is allowed.
Web Server Port
The web server port allows a standard web browser to access the controller web pages. These
pages provide information about the controller, diagnostic statistics regarding the operation of
the product, and access to the event log. See Section 9.1.2 for a description of the event log.
To access the controller web pages, simply enter the IP address of the controller in the browser
URL field.
