By default, through the PowerMonitorService, any QNX-based JACE provides status monitoring of the following items, via “Boolean” type slots:

If needed, you can make Px bindings or links to these slots (however, see PlatformServices binding and link caveats).

In addition to these read-only status slots, the PowerMonitorService provides related configuration slots, which you typically review at commissioning time. For more details and a related procedure, see “JACE power monitoring configuration” in the JACE NiagaraAX Install & Startup Guide.

A station running in a JACE controller with an “SRAM option card” may not have a PowerMonitorService, if running an AX-3.6 build prior to 3.6.44. Such a JACE is always considered “battery-less”, where its “DataRecoveryService” (for SRAM support) automatically removes the PowerMonitorService.This changed starting in build 3.6.44, such that any SRAM-equipped JACE (e.g. JACE-6E, JACE-3E, or another JACE with SRAM option card), always retains its PowerMonitorService, along with a DataRecoveryService (if the platDataRecovery module is installed). So, you can selectively disable battery monitoring. See the next section Battery monitoring disabled. Additionally, other SRAM support options exist. For related details, refer to the Engineering Notes II document JACE Data Recovery Service (SRAM support).

As new QNX-based JACE platforms are introduced, additional power-monitoring capabilities may be present in the station’s PowerMonitorService. For example, both the JACE-7 series and JACE-x02 Express series (“M2M JACE”) may be installed with two backup batteries: the NiMH battery like a JACE-2/6, plus an optional 12V sealed lead-acid (SLA) battery that provides system operation for some duration during a power outage. In this “dual battery” PowerMonitorService, separate slots exist for the monitoring and alarming of both batteries. For related details, see the latest JACE NiagaraAX Install & Startup Guide.