Fault In The Feedback Circuit; Contacts Of The Feedback Circuit Are Not Closed On Starting; Contacts Of The Feedback Circuit Do Not Close After Stopping; Cross-Circuit/Short-Circuit - Siemens 3TK2810-1 System Manual

Diagnostics/troubleshooting
7.4 Behavior in the event of a fault
7.4.4

Fault in the feedback circuit

7.4.4.1

Contacts of the feedback circuit are not closed on starting

Connection of output contact 13/14 or 23/24 is only possible if the relevant feedback contact
is closed.
A fault message is not displayed.
7.4.4.2

Contacts of the feedback circuit do not close after stopping

If the contacts of the feedback circuit do not close after the device is stopped, the contactors
are still energized or defective. A message is displayed.
A restart or reset is necessary following correction of the fault.
7.4.5

Cross-circuit/short-circuit

If a cross-circuit or short-circuit is detected, the device switches to the safe state. An error
message is generated and the diagnostics provides information on the location of the fault.
A restart or reset is necessary following correction of the fault.
7.4.6

Fault in the connection to the adapter

If an adapter module has been parameterized and the connection to the adapter is
interrupted, or the adapter signals a fault, the device switches to the safe state. An error
message is generated and the diagnostics provides information on the location of the fault.
A restart or reset is necessary following correction of the fault.
7.4.7

Violation of upper/lower parameterized speed limits

7.4.7.1

Automatic speed exceeded

If the parameterized maximum automatic speed is exceeded, the device switches
immediately to the safe state. Contacts 23/24 are opened and when the lower parameterized
standstill speed limit is violated, contacts 13/14 are closed. The corresponding signaling
outputs are switched.
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3TK2810-1 safety-related speed monitor
System Manual, 01/2011, 926246402000 DS 02