A warning signal is issued when the thermal load reaches the warning level set at THRM1: Rel. O/T warning PSx. Moreover, a time-to-tripping threshold (pre-trip time) can be set. When the time left until tripping falls below the setting at THRM1: Warning pre-trip PSx, a warning signal will be issued.

If the current falls below the default threshold of 0.1 Iref, the buffer is discharged with the time constant set at THRM1: Tim.const.2,<Ibl PSx. The thermal replica may be reset from the local control panel or via an appropriately configured binary signal input. Resetting is possible even when thermal overload protection is disabled. Thermal overload protection can be blocked via an appropriately configured binary signal input.