Honeywell HC900 Benutzerhandbuch

Components and Architecture - Networking Basics Reference 

Revision 5 

  HC900 Hybrid Controller Installation and User Guide 

31 

9/03  

Modbus TCP/IP 

Variant of Modbus protocol 

Modbus TCP/IP is a derivative of related Modbus 
protocol used with RS-232 or RS-485 data 
acquisition and supervisory structures.  Basically, 
Modbus TCP/IP encapsulates Modbus messages in 
TCP frames for transport in an Ethernet network. 

Modem 

Modulator-Demodulator; a 
device for translating data in 
differing media and/or 
format.   

Modems are commonly used for transmitting 
digital data over analog telephone lines.  A modem 
is required at each end of the link.  

Multicast 

Transmission of a message 
with multiple destinations. 

 

Name Server  

Network software that 
translates text-format names 
into numeric IP addresses 

See also “DNS”. 

NetBIOS 
/NetBEUI 

Microsoft networking 
protocols 

Used with Microsoft LAN Manager and Windows 
NT products. 

netid Network 

Identifier 

The portion of the IP address (left part) that 
identifies the network. 

Netware 

Network operating System 
(NOS) by Novell   

 

Network 

A system of 
interconnections in which 
networking devices such as 
Hubs, Bridges, etc transport 
messages between 
computing devices. 

“Computing devices” often include Personal 
Computers (PCs), but also can include other 
computer-based devices such as process 
controllers, operator interface units, and graphical 
trending devices. 
 

Network Address 

A code that resides in a 
networked device, and that 
identifies the device 
uniquely on the network(s) 
to which it is connected. 

The identifying code is usually numeric, but 
additional, text-oriented Name codes can for added 
user convenience in device identification. 
Network addresses usually include a MAC address 
and an IP address, and may also include Host 
Name (for a PC) or other text-oriented user name. 

Network 
Management 

Administrative services that 
include configuration, 
tuning, performance 
monitoring, and problem 
diagnosis and repair.  

Many commercial and industrial facilities have 
large networks that are managed by full-time, 
professional IT employees.  Other facilities 
contract the services of professional IT agencies.   
For networks that are dedicated for special 
purposes (process control, for example), and are 
uncomplicated and easy to control, Network 
Management is sometimes assigned to local 
employees as a part-time, add-on responsibility.   
Advised judgment is recommended. 
 
 
 

NIC Network 

Interface 

Card 

The NIC is plugged into one of the PC’s expansion 
slots.  It includes the hardware and software (OSI 
Layer 1 and Layer 2) required for connecting the 
PC to the network.