Configuring a controller with backup battery but no SRAM
- In the Nav tree, click , and double-click PowerMonitorService.The Power Monitor Platform Service view opens in the view pane.
- As needed, change configuration properties, which include:
Shutdown Delay TimerDefines the period that the controller waits between detecting loss of AC power and performing a graceful shutdown (backs up database and powers board off). Depending on controller model, using either a nickel metal hydride (NiMH) battery or sealed lead-acid (Sla) battery, this varies:
- For JACE-6 models (NiMH), the default value is 30 seconds. The valid range is 0 to 60 seconds (1 minute), maximum.
NOTE: Unless you specifically need a longer shutdown delay, the default 30 seconds can be the best option, especially if you are experiencing multiple power outages that occur in quick succession. In this case, the NiMH battery may not become fully recharged, introducing a greater risk of the controller being unable to complete a graceful shutdown upon loss of power.
- For JACE-603 and JACE-645 models (Sla), the default period is 10 minutes, with a range is 0 to 15 minutes. Generally, for these models, the default value is recommended, as longer periods mean more time running on battery power. Otherwise, in some scenarios, with multiple lengthy power failures in succession, the battery may become completely discharged.
- For JACE-6 models (NiMH), the default value is 30 seconds. The valid range is 0 to 60 seconds (1 minute), maximum.
Power Alarm SupportExpand this property (
) to access additional properties that define how the station handles primary power alarms, including the alarm class to use
and other alarm source information properties.
Battery Alarm SupportExpand this property (
) to access additional properties that define how the station handles battery alarms, including the alarm class to use and
other alarm source information properties. Several settings reflect read-only status properties:
Primary Power Present— Boolean, displays Yes (true) if AC power is currently supplied to the controller.Battery— container shows two values concatenated on a single line:State— (with icon) is an enumerated descriptor, which is typically Idle if fully charged, else Charging, Discharging, or Unknown.- If this indicator displays Charging, it also displays the estimated remaining charge time until fully charged (Charge Time Left).
Battery Good— Boolean, displays Yes (true) if the last controller backup battery test was good.Battery Time of Last Test- provides a timestamp (in AbsTime format) of the last battery test performed by the controller.
- Click Save to write the configuration to host platform (controller).