Published: November 18, 2022
Accessing PID loops on groov RIO causes “Device Failure” messages
- PAC Display
R10.3a to R10.4c
Resolved In Version:
With this issue, accessing a PID loop on a groov RIO using either PAC Display or OptoOPCServer will result in a “Device Failure” error. For example, in PAC Display, if you configure a PID Button object to reference a PID on a groov RIO, when you run your project and click on the button, nothing happens; instead, device failure errors are placed in the Event Viewer. This issue occurs when accessing the PID loop directly from the groov RIO instead of accessing it from the controller's host port.
If using PAC Display, go to Configure > Runtime > I/O Unit Tags and deselect the related groov RIO. If using OptoOPCServer, modify the item definition of the PID loop so that the device is CONT instead of MMIO.
Opto 22 has resolved this issue.
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