User Manual EM303B General Purpose Inverter Overload Pre-alarming 8.9.1 Overload Pre-alarming Control Overload pre-alarm status is enabled that mean present current of inverter exceeds overload detection scale and the remaining time exceeds the overload detection time. User can define the detection scale and remaining time. Overload pre-alarm detection F7-00 ones place=0 Overload pre-alarm detection will work all the time during operation of inverter. F7-00 ones place=1 Overload pre-alarm detection only works when the system works at constant speed.
Running mode of inverter at overload pre-alarm F7-00 tens place=0 There is pre-alarm after reaching the overload pre-alarming scale, and inverter will run continuously. F7-00 tens place=1 When reaching the overload pre-alarming scale, inverter will pre-alarm first and stop automatically after delayed for a while. The delay time is set by F7-03.
(Please use this function with the overload pre-alarm function of multi-function output terminal in order to obtain output display before inverter stopped.) F7-01 Overload pre-alarm detection time It defines that inverter will output overload pre-alarm signal after the output current exceeds the overload pre-alarm detection scale (F7-02) continuously for certain time. F7-02 Overload pre-alarm detection scale It defines the current threshold of overload pre-alarming. The setting value of F7-02 is the percentage to the rated current. F7-0 3 Overload pre-alarm stop delay time If F7-00 tens place=1, its stop delay time is set by F7-0 3 .
See Figure 7-23 overload pre-alarm control logic diagram for the description of parameters stated above. 129 No. Function Range Unit Default Type Overload Pre-Alarm Control Ones place： Overload pre-alarm detection 0: Detect all the time 1: Detect at constant speed Tens place: inverter status after pre-alarming 0: Alarm on, run continuously 1: Delayed stop after alarm 00 〇 F7-00 No. Function Range Unit Default Type F7-01 Overload Pre-alarm Detection Time 0.00～60.00 S 5.00 〇 F7-02 Overload Pre-alarm Detection Scale 0.00～600.00 % 200.00 〇 F7-03 Overload Pre-alarm Stop Delay Time 0.00～600.00 S 5.00 〇