User Manual

System configuration
Devices
22
330 | 353 CM110664en_07
Item Limit Description
MS/TP telegrams [100 - 140] pkt/s
@115,200 bps
[-120] pkt/s
@76,800 bps
Max. [~4,5] KB/s
The BACnet router integrates BACnet MS/TP not as a field bus in
the network. The router operates transparently and routes all data
traffic addressed to the subnet. This is why global broadcast
telegrams negatively impact transmission performance of the
router and end devices.
Recommendation: Do not carry out time and security-critical
process controls using BACnet MS/TP.
Depends on baudrate, number of nodes and maximum number of
data frames (N max_info_frames).
BACnet/LonTalk [100 - 120] pkt/s
@78 KB/s
Max. [~4,5] KB/s
The BACnet router integrates one (1) BACnet/LonTalk network.
The router operates transparently. The same restrictions apply to
global broadcast telegrams as for MS/TP.
BACnet/IPv4 [~2500] pkt/s
Max. [~500]
KB/s
The BACnet router can route between two BACnet/IP networks.
The BACnet/IP networks have different UDP ports.
BACnet/IPv6 1 The BACnet router integrates one (1) BACnet/IPv6 network. The
router works transparent, but when connection ports for
BACnet/IPv4 and BACnet/IPv6 are used simultaneously, make sure
that no unintentional ethernet loops are created on the IT side.
22.4.17 SX OPC
Item Limit Description
SX OPC applications 1 SX OPC application per PC. The performance depends on the PC
hardware.
OPC server [10] Max. number; OPC data access 2.x or 3.0 specification.
BACnet objects 20,000* Maximum number of BACnet objects.
Configured alarm recipients 3*
Temporary alarm receiver 20* Minus configured alarm recipients.
Alarm-generating objects [2,000] Alarm-generating objects (of total 20,000 BACnet objects).
SX BACnet references client resources
1
[1,000]
Trendlog objects 1000 Maximum number.
Scheduler program / Scheduler objects [15] Per BACnet server.
Calendar objects [10]
Key
1
Max. number of BACnet client connections (COF or polling), that is, values read from or
written to (commanded) the own automation station or a remote automation station.
BACnet client connections are used in Input, Output, Scheduler, Trendlog and Group objects
(all NameRef_Type inputs with AddrKind = B). The configured alarm receivers of the
Notification Class objects do NOT require any BACnet client references.
The available number of BACnet client references does not address more than 50 different
remote automation stations.
22.4.18 Desigo CC
For the system configurations of the Desigo CC management platform, see
Desigo CC System Description (A6V10415500).