User Manual

4/18/2011 Page 6 of 8
SignalFire Telemetry - Rev 5.0
Remote Modbus Register Mapping
Modbus Registers
In addition to any pre-configured registers, the Modbus Stick will send system
information in 16-bit registers in the table below. This data is accessible at any of the one
of more Slave ID’s connected the Modbus Stick.
Register Name Description
65524 AP rev# major Major revision number for the mainboard
65525 AP rev# minor Minor revision number for the mainboard
65526 Radio rev#
major
Major revision number for the radio
65527 Radio rev#
minor
Minor revision number for the radio
65528 NodeAddr (high) High 16 bits of SFTS node address
65529 NodeAddr (low) Low 16 bits of SFTS node address (the radio ID)
65530 Slave ID Slave ID readback
65531 RSSI Received signal strength of last packet from the slave
65532 Voltage System voltage of the Modbus client in millivolts
65533 Timeout Value Minutes until this slave will time out, unless new data is
received
65534 Register Count Number of registers cached for this slave device
65535 Device Type Remote device type (0 for Modbus Client Node)