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  1. If it really has copper wires, an error like the one you describe is feasible, it is mainly due to the fact that the Analog Input Module is usually hotter than outside. if the cabinet door is opened probably  the temperature will drop a few degrees.  For me to use or not thermocouple connectors is a minor problem and should not cause much error, but of course it is better to change them for the correct ones. It is important to use the correct compensation cable and with the correct polarity !, there are many standards with varied colors and an error is easy to occur.   Hope it will help.
  2. Hello :I'm the creator of an Android HMI app,  I recently added Ethernet/IP connectivity with MicroLogix and SLC AB PLCs, but I have only been able to test it with a MicroLogix 1100.I'm really not sure if it works with SLC or with other MicroLogix models.If someone could try it, I would appreciate it. To access the test, from the Android device, open this https://play.google.com/apps/testing/com.suppanel.suppanel on the web browser and install the Beta version.On the application you have to open the "EIP MicroLogic SLC Test" panel that contains some instructions. Thank you very much !

    Take a look to this, it supports OPC UA  https://play.google.com/store/apps/details?id=com.suppanel.suppanel
  4. S7-300 published protocols

    Thanks JesperMP
  5. S7-300 published protocols

    which free documented protocols can i use to read/write bit & word in a S7-300 memory using serial comms or ethernet ... i mean without need to buy siemens or third part extra drivers, OPC or libraries. Thanks in advanced