User Manual

System limits
Technical limits
5
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5.3 Technical limits
The following limits are recommended and verified.
Function Touch panel BACnet/IP web interface
TCP/IP BACnet/IP
PXM50-1
PXM40-1
PXM30-1
PXM50.E
PXM40.E
PXM30.E
PXG3.W100-1
PXG3.W200-1
Max. number of assigned devices
BACnet/IP
BACnet MS/TP *)
n.a.
50
10
50
10
Number of simultaneously connected operator clients
1
n.a. 5 5
Max number of devices connected to one BACnet device
n.a. 5 5
Data points per plant graphic
n.a. 40 40
Data points (in a table)
n.a. 40 40
Number of defined users
n.a. 8 8
Trend chart, max. number of entries
(Max. 5 trends, with 10,000 each)
50,000 50,000 50,000
Max. entries per online trend
2
10,000 10,000 10,000
Max. entries per BACnet trendlog object
3
5000 5000 5000
Trend export: Max. number of entries per trend
10,000 10,000 10,000
Max. alarm History entries
10,000 10,000 10,000
*) see specific MSTP section for more specific limitations
1
5 is the recommended number. More clients can be connected, but performance deteriorates when the same operations are
performed simultaneously. Example: Simultaneous load of the same plant graphic to 10 clients.
2
Trend data management must be configured according as part of the online trend configuration.
10,000 trend entries can be recorded from:
● 1 trend entry daily over a minimum of 25 years
● 1 trend entry every hour over a minimum of 1 year
● 1 trend entry every 15 minutes over a minimum of 3 months
3
The time to read a BACnet trendlog object depends on the number of entries and the data link.
Desigo Control Point is optimized for BACnet/IP devices which are supporting COV communication. The objects
of an assigned device will automatically be polled if the device does not support COV. Polling causes a higher
network communication load. This can decrease the overall performance of the Desigo Control Point device,
depending on the BACnet device and on the type of communication (MS/TP). Such topologies must be tested
individually and project specifically.