The activation of the function is enabled at CBF_1: General enable USER. If this enabling function has been activated, CBF can be enabled or disabled via setting parameters or through appropriately configured binary signal inputs. The front panel HMI and the binary signal inputs have equal priority in this regard. If only the function CBF_1: Enable EXT is assigned to a binary signal input, then CBF will be enabled by a positive edge of the input signal and disabled by a negative edge. If only the parameter CBF_1: Disable EXT has been assigned to a binary signal input, then a signal at this input will have no effect.