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.W100-2

PXG3.W200-2

Max. number of assigned devices
BACnet/IP
BACnet MS/TP *)
BACnet LonWorks *)

n.a.


50
10
10


50
10
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 2

n.a.

15

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 3

10,000

10,000

10,000

Max. entries per BACnet trendlog object 4

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 and LonWorks 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

AM Charts and gauges can have up to 15 points.

3

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

 

4

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, LonWorks). Such topologies must be tested individually and project specifically.