SIEMENS PLC

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ANALOG INPUT READINGS 4-20ma CONNECTED TO 6ES7 336-1EH00-0AB0 WITH THE CPU SIEMENS 414H. ALL THE READING ARE SHOWING 32768 AND HANGED, BUT THE PROGRAM IS WORKING AND ALL OTHER MODULES ARE WORKING FINE.

THERE ARE FEW ANALOG INPUTS 4-20ma CONNECTED TO THE CPU SIEMENS 414H.
SUDDENLY ONLY FEW READING OF A PARTICULAR ANALOG INPUT GETS HANGED AND SHOWS 32768, BUT THE OTHER MODULES ARE READING NORMAL AND THE CPU ALSO PERFORMS THE PROGRAM. BUT WHEN I RESET THE ANALOG INPUT MODULE BY TAKING OFF FROM THE RACK AND RECONNECTING IT, IT STARTS TO WORK NORMAL.
COULD ANY ONE SUGGEST ME WHY THE ANALOG INPUT MODULE GET HANGS OFF.
 
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