The function can be enabled and disabled with the Operation setting. The corresponding parameter values are "On" and "Off".
The operation of ESMGAPC can be described using a module diagram. All the modules in the diagram are explained in the next sections.
Standstill detector
The module detects if the motor is in a standstill condition. The standstill condition can be detected based on the phase current values. If all three phase currents are below the set value of Motor standstill A, the motor is considered to be in a standstill condition.
Timer
The timer is a fixed 10-minute timer that is activated when the ST_EMERG_RQ input is activated and motor standstill condition is fulfilled. Thus, the activation of the ST_EMERG_RQ input activates the ST_EMERG_ENA output, provided that the motor is in a standstill condition. The ST_EMERG_ENA output remains active for 10 minutes or as long as the ST_EMERG_RQ input is high, whichever takes longer.
The activation of the BLOCK input blocks and also resets the timer.
The function also provides the ST_EMERG_ENA output change date and time, T_ST_EMERG. The information is available in the monitored data view.