Rev 1.15
SignalFire Telemetry
6
Status LEDs
The DIN Gateway has three LED Available for field diagnostics. The RS485 TX/RX
LEDs will blink in response to RS485 traffic, the status LED is described below.
STATUS LED
Description
Slow Flash (3 second pause)
System is running and in communication with radio network
Fast Flash (0.5 second pause)
System is running but no network found
Solid On
System Fault needs service or rescue bootload
Operation
The DIN Gateway supports all remote SignalFire nodes making all remote sensor data
available in Modbus format.
The register data from remote sensor nodes is available by requesting the remote node’s Modbus ID
and register address from that node’s register map. The gateway will respond with the most recent
copy of the data from the remote node. The gateway will automatically time-out data from a remote
node it stops receiving data for.
If the remote node is a Modbus-Stick additional features are supported.
Remote Modbus Sticks and Sentinel-Modbus (non-sleeping radio only) Nodes
Remote nodes that have been pre-configured forward their set of registers to the Modbus gateway
on a pre-defined schedule (1 minute to 5 minutes is typical). The register data is then buffered in the
gateway and is available to be read by the RTU at any time.
If a Modbus request is received by the gateway for a Modbus ID and address for which buffered data
does not exist, but the Modbus ID is known, the Modbus request will be forwarded to the remote
Modbus node over the SignalFire network. The response is returned to the RTU.
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.
