The DataRecoveryService automatically creates and manages buffers in a JACE controller’s available SRAM (Static RAM), allowing
“battery-less” operation. It applies to these platforms:
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A JACE-3E series controller (based on the NPM3 processor, with built-in SRAM). This model was introduced in 2013, around the time of a NiagaraAX-3.7 update release (build 3.7.105).
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A JACE-6E series controller (based on the NPM6E processor, with built-in SRAM). This model was introduced in early 2012, around the time of a NiagaraAX-3.6.44 maintenance release.
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A JACE-603 or JACE-645 controller configured for NiagaraAX (and not Niagara R2). These “retrofit board” JACEs are also based on the NPM6E processor, and are supported in build 3.6.44 or later.
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A JACE-2,-6,-7 series or JACE-x02 Express (XPR or M2M) series controller, with an installed “SRAM option card”.
Starting in build 3.6.44, an SRAM-equipped JACE can additionally (and optionally) use a backup battery—such as an NiMH onboard battery pack, and (if applicable) and external 12V sealed lead-acid battery. In this case, both the DataRecoveryService and PowerMonitorService can run in the station’s PlatformServices container, operating independently or in unison, as configured.
For details, see the “About the DataRecoveryService” section in the Engineering Notes II document JACE Data Recovery Service (SRAM support).