Troubleshooting

Some typical errors have been identified up to now:

• The device cannot instantiate, but remains in INIT state: in this case, likely the device cannot connect to one of the needed PLC devices (pump, valve or gauge). The state of those devices (from both karabo and PLC side) should be investigated. They may be in error state, or not instantiated, or the PLC is not connected (PLC troubleshooting);
• In case the gauge readout does not change, although the valve is opened and the pump appears to be pumping, control please that the pump connected to the PLC is fully functional;
• In case no history is present in the pressure graphs, although the gauges are active since some time, then possibly the property Archive is set to False. This parameter allows the properties of this device to be logged. In this case, the device should be shutdown, this property set to True, the project saved, and finally the device restarted;
• In case a component was replaced, the previously saved scene may still point to the previous device, thus showing a broken link although the situation in the configuration editor appears fine. This problem is fixed by deleting the old scene, and saving again the auto-generated one.