GRIDview HMI & Protocol Converters by Marketing | Nov 15, 2017 | System Accessories-Group GRIDview HMI - Protocol Converters HMI & Protocol Converter Configuration Crimson 3.0 – Connect to PCGRIDlink Modbus RTU ConnectionHMI – Protocol Converter Data TagsProtocol Converter Modbus to BACnet FAQ What does -BB?? mean?