User Manual

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
147
5.5.1
Basic settings for communication
Setting communication via BACnet
Procedure
1. Select the default setting 110
– With Startdrive during commissioning step "Default setting of setpoint/command
sources":
110 "BT Mac 10: BACnet MS/TP fieldbus"
– With the BOP-2 during the basic commissioning under step "MAc PAr P15":
P_F bAc
– Via parameter number:
p0015 = 110
2. Set the inverter address.
3. Make additional changes based on the parameters listed in the following sections.
4. If you are working with Startdrive, back up the settings so they are not lost if the power
fails.
You have now made the settings for communication via BACnet.
❒
Settings by "BT Mac 10: BACnet MS/TP fieldbus"
Fieldbus protocol selection p2030 = 5
Baud rate p2020 = 8, 38400 bit/s
Setting range: 9600 bit/s … 76800 bit/s
Fieldbus monitoring time p2040 = 1000 ms
Setting range: 0 ms … 1999999 ms
The more slaves that are connected in the network, the longer the fieldbus monitoring time
must be.
If process data is not transferred within one cycle of the fieldbus monitoring time, then the
inverter shuts down with fault F01910.
p2040 = 0 ⇒ bus monitoring deactivated.