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ION 7500 / ION 7600 User’s Guide Setpoint Configuration
Chapter 3 - Default Meter Functionality Page 61
Setpoint Configuration
The Relative Setpoint module provides extensive control, secondary protection,
and analysis capabilities by allowing you to initiate an action in response to a
specific condition. It is particularly useful for performing actions based on
differences between a value (e.g. kW on phase A) relative to a reference value (e.g.
kW demand for all three phases). You can use this module’s outputs for demand
control of equipment or any other applications requiring setpoint activity relative
to a varying value.
The Relative Setpoint modules monitor the following for "over" conditions: phase
current, kW demand, and voltage unbalance.
Relative Setpoint Module Settings
There is no need to change any of the Relative Setpoint modules’ setup registers
for normal operation of the meter.
Fine Tuning Over Condition Monitoring
If you want to fine-tune over condition monitoring, the only setup registers you
should change are SusUntlON and SusUntlOFF.
SusUntlON determines how long the modules wait after an over condition is
detected before reporting it. This gives the monitored value a short period to
correct itself before the event is registered with the module so that very brief over
conditions are ignored. Similarly, SusUntlOFF is the amount of time a normal
value must be present before the module considers normal operation to be
restored. Both SusUntlON and SusUntlOFF values are entered in seconds (the
default value for both is 30 seconds).
Refer to the online ION Programmer’s Reference for more information about the
Relative Setpoint module.
Module Label Description
Relative Setpoint 1 Over KW sd When active, this annunciates when the total kW SWDemand exceeds a specified amount.
Relative Setpoint 2 Over I a When active, this annunciates when the current on phase A exceeds a specified amount.
Relative Setpoint 3 Over I b When active, this annunciates when the current on phase B exceeds a specified amount.
Relative Setpoint 4 Over I c When active, this annunciates when the current on phase C exceeds a specified amount.
Relative Setpoint 5 Over V unbal When active, this annunciates if the voltage unbalance exceeds a specified percentage.
Relative Setpoint 6 Over I 4 When active, this annunciates when I 4 exceeds a specified amount.
Relative Setpoint 7 Over I 5 When active, this annunciates when I 5 exceeds a specified amount.