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System limits
LonWorks limits
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6.5 LonWorks limits
Use the router PXG3.L / PXG3.M with HW Index C only.
Data point integration: LonWorks devices take a lot longer than IP devices due to the lower network speed.
Reference value: Approximately 30 times longer (depending on the project setup).
To avoid timeout problems,
● Use the workflow: Data point integration.
● Integrate at the standard user level
● Avoid the "Cache" dialog
● Create templates for individual data point selection for LonWorks devices on IP devices.
These templates can then be imported to the LonWorks devices.
6.6 Limits for MS/TP
Use the router PXG3.L / PXG3.M with HW Index C only.
Data point integration: MS/TP devices are considerably slower than IP devices due to the lower network speed.
Reference value: Approximately 15 times slower (depending on the project setup).
MS/TP is tested with 10 devices that support COV (e.g. DXR2). Recommendation: Assign or integrate a
maximum of 10 MS/TP devices on one network branch. More devices and/or network complexity are permitted,
but they may result in longer and inconsistent times and degraded performance.
● Assign devices offline/online:
More than 10 devices degrade performance in ABT-SSA.
Additional network branches degrade performance in ABT-SSA.
● Device learning offline/online:
More than 10 devices takes longer.
The times are slower with additional network branches.
● Device restart (e.g., after the power returns):
More than 10 devices takes longer.
The times are slower for a restart.
The following limits and constraints must be considered if the MS/TP devices do not support COV, i.e. only
polling:
● Disable the list view core function (user profile setting in ABT Site)
● Limit to one concurrent operating client (limit your network topology)
● Set baud rate to 38400 or higher
● Only use the online trends functionality very limited
● Limit the points per graphic to 15
6.7 Supported BACnet objects
The BACnet objects supported in Desigo Control Point are listed in the Appendix [➙ 40].