MG.10.O1.02 VLT is a registered Danfoss trademark
4
VLT
®
5000 INTERBUS
Technical overview.
Interbus
introduction
The INTERBUS system is divided into two different
system: remote and local. The remote system
enables the user to connect up to 256 stations on a
single system wiht a maximum of 400m Cable
between each station.
The locale bus system enables the user to establish
communication to Input/output devices throuhgt a
single twisted pair of Cables. This type of
comunication is typical used the simple devices E.g.
Digital I/O devices.
For Communication on the remote bus the
INTERBUS system provides two different type
s
of
communication Process Data and PCP (Peripherals
Communication Protocol). The Process Data is
cyclic communication to devices with high priority.
This type of communication typically takes between
few milliseconds and up to 100 milliseconds,
depending on the size of the system. Example of
this type of communication is digital & analogue I/O
or control word & reference to frequency
converters.
PCP communication are used for communications
needs that does not require high speed and and
typically only are activated on request from the user
writen program. Typical time to read/write a single
value is 100 to 200 millisecond. Example of this type
of communication is configurating Data, read of
service parameter such as running hours, number
power up and KWh.