Enabling or disabling SRAM support
SRAM support is provided by the DataRecoveryService, a platform service that applies to SRAM-equipped controllers. This service has only a single configuration property:
Service Enabled. The main use case for this property is for JACE-3E or NPM6E-based controller (JACE-6E, JACE-603, and JACE-645) with an installed backup battery, where you do not want it to use SRAM. This property setting is retained in any future controller upgrades.
Prerequisites: A station in the controller is running and open in
- In the Nav tree, click , and double-click DataRecoveryService.The Data Recovery Service Editor opens.
By default, the
Service Enabledproperty istrue. This is appropriate if the controller has no backup battery installed—for example, the JACE-3E and JACE-6E ship from the factory without a battery. - Do one of the following:
- If the controller has a backup battery installed, you can optionally set this property to
false, providing:- The
Battery Presentproperty in the station’s PlatformServices container is set totrue. - The backup battery is known to be good. If you disable SRAM support, is recommended that you set the PowerMonitorService’s
Shutdown Delaytime to no higher than the default of one (1) minute.
- The
- If a controller without a battery is powered from a battery-backed UPS, you could also choose to set
Service Enabledtofalse.
NOTE: If you setService Enabledtofalse, the DataRecoveryService no longer records runtime database changes to SRAM. The controller depends entirely on its backup battery to preserve station data upon a power loss!
- If the controller has a backup battery installed, you can optionally set this property to
- To write the configuration to host platform, click Save.You are prompted to reboot now to apply the changes.
- Click Yes to reboot with the change in the DataRecoveryService (disabled or enabled) made effective.
For more details, including scenarios where this configuration may be best, refer to the Niagara Data Recovery Service Guide.