HMS Networks Intesis BACnet, User Manual, Page: 7 / 46

Intesis
TM
BACnet Server
– PROFINET
User Manual r1.0 eng
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
URL http
s
://www.intesis.com
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Functionality
On the PROFINET side, the gateway acts as a PROFINET IO-Device, so after the start up process, the gateway
presents its points as PROFINET IO data to exchange them cyclically or using acyclic Read/Write requests, according
to their configuration.
•
Acyclic communication (Unscheduled, on demand communications). Data exchanged using this method
is called ‘PROFINET Record Data’ and is exchanged using acyclic Record Data Read/Write requests.
•
Cyclic communication (Scheduled, repetitive communications). Data exchanged using this method is
called ‘PROFINET IO Data’. Gateway will send periodically all points configured as ‘cycle’.
When an IO-Controller writes a PROFINET register in the gateway, the new value is updated on the BACnet side to
be read by BACnet clients using pooling method and, if this BACnet object has active subscriptions the new value
will be sent to the subscripted BACnet device(s).
From the BACnet system point of view, after the start up process, the gateway listens to any subscription (COV)
request, serves any polling request, or performs any writing request of its internal points received from the BACnet
system.
The values received from BACnet are immediately written in the associated register on PROFINET side, available to
be read by an IO-Controller and/or updated on the next refresh cycle.
Gateway’s capacity
Intesis capacity is listed below:
Element
1200
version
Notes
Type of BACnet
devices
IP / MSTP
Communication with BACnet IP
and MSTP
Number of BACnet
Objecs
1200
Maximum number of points that
can be defined in the virtual
BACnet
device inside the
gateway
Number of BACnet
Subscriptions (COV)
requests
2400
Maximum number of BACnet
subscriptions (COV) requests
accepted by the gateway
Communication
Chanels supported
RT (Real-Time), IRT (Isochronous Real-Time)
Types of PROFINET
communication channels
suported
Memory available in
PROFINET
Cyclic: 500 bytes as Input; 500 bytes as Output
Acyclic: Up to 4800 bytes
Amount of memory available for
mapping on PROFINET (as
cyclic and acyclic).