Rev 4.9
SignalFire Telemetry
18
Example
Line 1 has been configured with a source data node as a Sentinel-Analog with the loop current (in
μA) as the selected register. The relay will energize when the loop current is above 1400μA
(14mA) and de-energize when the loop current is below 1300μA (13mA). Note that this
configuration has a 1000μA (1mA) hysteresis factor.
In this example all 4 source nodes are assigned to the same destination Modbus ID and relay channel so the
following statement applies:
If more than one rule is assigned to the same destination RSD Stick and relay channel, then all
the rules must meet the energize condition for the remote relay to be energized. In other
words, the RSD table logic is a Boolean AND.
Alternatively, this means that if any one of the four source node’s logic results in the “de-
energize” condition being true the relay will be de-energized (safe).
RSD Event log
The RSD events will be stored in the gateway internal event log which can be read using the ToolKit.
Additionally, a basic RSD event log containing the last 5 RSD events is available to be read via Modbus from
registers 7000-7024. See the Modbus register map for details. The Modbus event log it not maintained
through gateway resets.
