Troubleshooting and repair

General problems

Problem	Cause/solution
The data logger does not respond (status LED always off).	Check the cable connections (see Connection of the sensors, actuators and the supply)
An extension module does not respond (ready LED always off).	Check the cable connections (see Connection of the sensors, actuators and the supply or Connection of the extension modules)
Communication problems	Load the device log from the myDataconC3+ using the DeviceConfig (see "Log" tab). A list of all the possible device logic error codes is included in the chapter "Log entries and error codes" (see Log entries and error codes).
Not all or no data is available on the server.	The connection was aborted during the transmission, which is indicated by a timeout entry in the connection list (see "myDatanet Server Manual " 805002). Solution: Initiate a transmission or wait for the next cyclical transfer. The assignment of the device and site is not correct (see Site).
The data at universal input is not plausible	Check the cable connections (see Connection of the sensors, actuators and the supply) Check whether the output signal of the sensor that you are using is compatible with the electrical characteristics of the universal inputs (see Technical details about the universal inputs). Check the filter setting of the universal input (see Measurement channels on the myDatalogC3xx).
Communication via CAN interface isn't working (error LED blinking or on)	Check the cable connections (see Connection of the extension modules) The total lengt of the CAN bus exceeds the maximum permissible limit of 20 m . The terminal resistors for the CAN interface have not been set correctly for thebus participants (see CAN bus without branch lines) There are other participants on the CAN bus. Only a device of the myDatalogC3xx family and compatible extension modules may be on the CAN bus.
The alarm state of a measurement channel has not been recognised.	Increase measurement interval
The alarm state has not been transmitted although the data is available.	Check the alarm settings of the measurement channel The connection was aborted during the transmission, which is indicated by a timeout entry in the connection list (see "myDatanet Server Manual " 805002). Solution: Initiate an aloha transmission or wait for the next cyclical transfer.
The alarm notification was not delivered even though the alarm was signalled.	Check the settings of the alarm schedule (see "myDatanet Server Manual " 805002) Check the address data of the alarm schedule (see "myDatanet Server Manual " 805002)
Relay does not respond.	Failure of the voltage that is fed via the relays.
An incorrect current value is output on the analogue output.	Check the cable connections (see Connection of the sensors, actuators and the supply) The load of the connected device exceeds the permissible value (see Analogue outputs on output extension (mA OUTPUT)).