Communication via RS485
5.5 Communication via BACnet MS/TP - only CU230P-2 HVAC / BT
Fieldbuses
Function Manual, 04/2018, FW V4.7 SP10, A5E34229197B AE
149
Parameters for setting communication via BACnet
General settings
Processing times p2024[0 … 2]
p2024[0]: 0 ms … 10000 ms, maximum processing time (APDU timeout), factory setting =
6000 ms,
p2024 [1 … 2]: Irrelevant
BACnet communication parameter p2025[0 … 3]
● p2025 [0]: 0 … 4194303: Device object instance number,
Factory setting = 1
● p2025 [1]: 1 … 10: Maximum Info Frames, factory setting = 5
● p2025 [2]: 0 … 39: Number of APDU Retries (repeated attempts after fault telegrams),
factory setting = 3
● p2025 [3]: 1 … 127: maximum master address, factory setting = 32
Setting the COV_Increments p2026[0 … 74]
(COV = change of values) 0 … 4194303.000, factory setting = 1. A maximum of 32 COVs
are permissible.
COV_Increment: Changes the value of the "present value" of an object instance for which
the server transfers an UnConfirmedCOV_Notification or ConfirmedCOV_Notification.
You can use these parameters to set for which inverter value changes an
UnConfirmedCOV_Notification or ConfirmedCOV_Notification result is sent.
The factory setting 1 means that the inverter sends an UnConfirmedCOV_Notification or
ConfirmedCOV_Notification if the considered value, e.g. for a range of 0 … 10 V, changes by
an absolute value ≥ 1.
This requires an active SubscribeCOV_Service to send the relevant object instance.
You can also set the COV_Increment via the object property "COV_Increment" of the
relevant analog input, analog output or analog value.
BACnet language selection p2027
German/English - only becomes effective after power off/on
Fieldbus error statistics r2029
Displaying receive errors at the fieldbus interface
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