Rev 1.0
SignalFire Telemetry
11
If a request for multiple registers is issued by the RTU, and if the gateway does not have all
registered data buffered, an exception will be returned. The system will not combine buffered
and transparent data within a single Modbus response.
Remote Modbus Stick Node Re-Scan
It is possible to make a remote Modbus Stick re-scan for attached Modbus devices by writing to one
of the gateway’s configuration registers. This is useful to discover a Modbus device that is added to
an existing Modbus node. The scan may be initiated by one of the two methods. First, if the radio
address of the Modbus Stick is known, writing this address to gateway register 3000 will result in a
scan. Second, if the Modbus ID of one of the already registered devices attached to a Modbus Stick is
known, a scan will be started by writing the ID to gateway register 3002.
