This is error "E201." See the user's manual for possible causes and solutions.
Press the STOP key to clear the error. If you press the STOP key but the error doesn't clear, press the STOP key again. Up to 3 errors can be held. When the erorr clears, the unit number appears. (Normally "00.")
For industrial DAQ applications, the MW100 offers scalability and can operate either standalone or integrated as a node within a larger automated system including SCADA or DCS.