Distech Controls ECLYPSE APEX, Руководство пользователя

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20 ECLYPSE APEX
CHAPTER 4
IP Network Protocols and Port Numbers
This chapter describes the IP Network Protocols and Port Numbers used by the ECLYPSE controller.
About Port Numbers
In an IP packet, a port number is an extension of the packet’s IP address and completes the destina-
tion address for a communications session. By convention, the packet’s port number is associated
with a protocol used between software applications and is used to uniquely identify a communications
endpoint for a specific application or process running on a computer. This allows a multitude of appli-
cations to share a single physical connection to the Internet while allowing distinct communication
channels between different applications.
For example, your web browser listens to port 80 on your computer to receive HTML web pages sent
from a web server on port 80.
The standard port numbers used by controllers is explained in
IP Network Port Numbers and Protocols .
Sometimes, two applications might use the same port number to communicate. To sort out this con-
flict, the following methods can be used.
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In the configuration of some applications, the port number can be changed from its default setting.
Should you change it, you must also change it on the corresponding application also so that the
port numbers will match.
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Routers have features such as port forwarding that can change an incoming packet’s port number
coming from the Wide Area Network (WAN) to another port number on the Local Area Network or
vice versa.
IP Network Port Numbers and Protocols
This section lists the IP Network Protocols to communicate over IPv4 networks. The corresponding de-
fault in-bound port number is also shown.
Service Default Port
Number (Protocol)
Description Where can this port
number be changed?
SMTP 25 (TCP) Outgoing Email server port number.
See the EC- gfx Program User
Guide, Resources
Configuration.
DNS 53 (TCP, UDP) Domain Name Server URL lookup. –
DHCP 67 (UDP)
The router’s DHCP service that allows a device to auto-
configure a devices’ IP settings.
–
HTTP 80 (TCP)
EC- gfx Program Debugging Values (REST service):
After the control logic or code has been sent to the
controller, a live debugger allows programmers to
execute code, view input/output values, and
troubleshoot errors in real-time.
ENVYSION: The ENVYSION server presents system
status, trending visualization, real-time equipment
visualization, schedule configuration, alarm monitoring,
and dashboard functions to a Web browser operator
interface.
Web Configuration Interface: This is the network
configuration interface for wired and wireless IP network
interfaces.
See System Settings . If this is
used with EC-Net, this
parameter can be changed in
the RestService and
WebService.
IP Network Protocols and Port Numbers