Proposed is a
system for
processing plastics, having at least one plastics-
processing machine (100) and having a control and
operating system for the control and operation of said
machine (100). The plastics-
processing machine has safety-relevant actuators (110, 112, 113) and safety-relevant sensors (125a, 125b, 130a, 130b), which each generate a switch-off
signal if a safety-relevant event occurs. The control and
operating system comprises a cycle sequence controller which, in the production mode, controls the actuators of the plastics-processing machine and, for this purpose, uses a first computing unit (20) equipped with a first
operating system. The control and operating
system comprises a safety controller which: operates according to a safety program; uses a second computing unit (25); is communicatively connected to the safety-relevant sensors (125a, 125b, 130a, 130b); and is configured to directly switch off at least one safety-relevant
actuator (110, 112, 113) in the presence of a switch-off
signal generated by a safety-relevant sensor. In order to further increase
operational safety, at least one bidirectional
data exchange device (26) is provided, via which the cycle sequence controller and the safety controller exchange and / or compare data at least in a production mode. The cycle sequence controller transfers the machine (100) into a defined parked position if said cycle sequence controller detects a malfunction or a failure of the safety controller, and the safety controller switches off the at least one safety-relevant
actuator (110, 112, 113) if said safety controller detects a malfunction or a failure of the cycle sequence controller.