Technical data

346 • Glossary
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
Operating System
An operating system is a software used for managing equipment such as
memory and connected devices, and for executing programs.
P
Parameter Setting
Parameterization is defined as the assignment and storage of set-up and con-
figuration data as they are required for the execution of predefined functions.
Ping Command
When a ping command (ping < IP address) is entered, the ping program
ICMP generates echo request packets. It is used to test for node availability.
Port Number
The port number, in conjunction with the IP address, is the unique connec-
tion point between two processes (applications).
Predictable ETHERNET
The predictable message delay time on an ETHERNET network. The meas-
ures that are taken here enable nearly real-time requests to be realized.
Prioritization
BACnet applications can access Objects through Services and change their
properties. Access prioritization is required to regulate and organize access
of various applications to the properties. The BACnet standard distinguishes
between 16 different priority levels. A priority can only be set for the current
values (Present_Value) of output objects. For this reason they are also called
"command properties". The processing sequences for individual applications
can be changed using prioritization. Simultaneous access of several applica-
tions to the same Objects is regulated in this manner. The application with
the highest priority level (lowest number) is given priority.