User Manual

System conf
iguration
Devices
22
CM110664en_07 331 | 351
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).
22.4.19 Desigo Insight
For the system configurations of the Desigo Insight management station V6.0 SP2, see
Desigo Building
Automation System 6.0 SP, Technical Principles
(CM110664 / 2016-09-20).
22.4.20 Desigo Xworks Plus (XWP)
Item Limit Description
Length of site name 9 Max. 9 characters.
Number of XWP per BACnet internetwork
(parallel engineering)
10 Parallel engineering is possible under the following limitations:
Node setup: Only one XWP per LonWorks/IP segment.
Download and online operation: Only one XWP per automation
station.
Number of I/O function block instance per
plan
200 The number of I/O function block instances are limited per plan
(compound). Mapping of function blocks on BACnet sets the limit.
The limit is lower for other function blocks mapped to BACnet.
Problems with a high number of data points per automation station
When the maximum number of data points for a PXC..U is reached (350), it may no longer be possible to
load the program into the PX automation stations due to the number of data blocks generated during
compilation.
In this case, carry out the following steps on the PX automation station:
1. Reload parameters.
2. Run Reorganize in the PX Design Manager.