6/10/2020 1:34 PM | |
Joined: 10/27/2009 Last visit: 6/28/2024 Posts: 26 Rating: (13) |
Alarm 31885 is very often an EMC or grounding problem. The signal transmission between two Drive-CliQ(DQ) components is disturbed by external influences. The following workarounds have helped so far: 1. use original Siemens DQ cable. These are checked and the wiring of the plugs fullfills the high EMC requirements which are not always guaranteed and measured by cable third-party manufacturers. 2. the DQ plug or socket has a loose contact, so plug the cables again and check both sides of the connection. 3. if this does not help, the cause is often a missing grounding of the DQ cable shield when it entering the switch cabinet. Use one of the following options for grounding the shield of the DQ cable: -Use a DQ cabinet bushing (recommended) 6SL3066-2DA00-0AA0 See for more details also the EMC design guidelines configuration manual |
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