Rexroth Tightening System 350 System Documentation - Rhino ...

70/316 Bosch Rexroth AG | Tightening Technology 6 Control Signals6.3 Timing diagrams6.3.7 Cancellation of a tightening sequence by removing the En enable signal(1) Input, (2) Output6.3.8 Acknowledgement of a class 3 system error via the PLC interface(1) Input, (2) OutputA class 3 system error occurs in the tightening controller, i.e. the tightening controller is no longer readyfor operation (Rdy = “low”). The system error is acknowledged when the ResF signal changes from “low”to “high”, i.e. NF = “high”, and the controller is ready for operation again (Rdy = “high”).6.3.9 PLC behavior with a class 1 system errorA class 1 system error occurs in the tightening controller, i.e. the tightening controller is no longer readyfor operation (Rdy = “low”). As an error of this error class cannot be acknowledged via the PLC interface,the tightening controller does not react to the ResF signal changing from “low” to “high” and the timeoutof 1 s elapses without the system error being acknowledged.NoteA class 1 error can only be acknowledged by switching the system off and on or by resetting the controller.System 350 | 3 608 878 040/05.2008