S-Flex VFD with BACnet card will not come online with bCX
S-Flex, bCX, MSTP
BACnet communication card that comes with S-Flex VFD is not set up by default to communicate via BACnet
S-Flex VFD has Altivar 21 BACnet Card VW3A21315. The default communication protocol setting for this card is Modbus RTU/Lonworks. Change setting of the communication protocol parameter F829 to a value of 4 (BACnet).
Note: Must power cycle the drive for any settings to take effect.
Set F800 (comm speed) to value of 1 - this is the default ,19200 and make sure the MSTP is set the same.
Set F891 to a value of 2 (bit rate of 19200 bit/s)
Also set F893, F894, F895, F896 - other BACnet settings. See Altivar 21 BACnet Card manual for more information.