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| Quick Help
Analog Value objects may be both a source and destination for Modbus register or BACnet server object data. The source of data for the AV object will be reading a remote Modbus register or remote BACnet server object when associated with a Read Map. The destination of data for the AV object will be writing a remote Modbus register or remote BACnet server object when associated with a Write Map. The AV object may be simultaneously associated with both Read and Write maps pointing to the same remote Modbus register or remote BACnet server object. This usage is most analagous to the traditional Modbus Holding Register where you want to write the register, but read back any different data that register may contain later. When the external BACnet client writes a new value to the AV object, this data will be written to the Modbus register or remote BACnet server object before any subsequent read. Thus the AV data is not discarded by the read operation before the new data can be written. Out of Service means the remote Modbus register or remote BACnet server object will be neither read or written. Reading and writing will resume when placed back in service. Reliability codes may be any of the following: Status flags A,B,C,D indicate the following, 0 meaning not true, 1 meaning true: Device link will indicate RTU or TCP for Modbus, or BIP for BACnet, followed by R for read or W for write, and a number which is the rule number in the table of read or write rules for mapping Modbus or BACnet to this BACnet object. The designation R means read from Modbus or BACnet, and W means write to Modbus or BACnet. | ||||||||
