5.The Concrete Explanation of Function Parameters
EM8 User's Manual
43
Remark
●
If the external power supply, the best selection is DC 24V/50mA.
Diagram 5-7: Frequency arrival signals
2: Frequency level detection signal(FDT)
When the inverter output frequency is more than FDT
frequency level, after set delay time, the output signal (low level), when the inverter output frequency is
lower than the FDT frequency level, after the same delay time, outputs an invalid signal (high resistance).
Frequency level detection (FDT) is as shown in Diagram 5-8:
Diagram 5-8: Frequency level detection (FDT)
Remark
●
The level of FDT is set by parameter b-59, [A-0] = 0, fixed 10.0Hz.
●
The delay time is set by the parameter b-60, [A-0] = 0, fixed for 2 seconds.
3: Over-load alarm
.
When the inverter output current exceeds the overload alarm level, after the set alarm
delay time, inverter outputs a signal (low level). When the inverter output current is lower overload alarm
level, after the same delay time, inverter outputs an invalid signal (high resistance). Overload alarm
diagram is as shown in diagram 5-9:
Diagram 5-9: Schematic diagram of overload alarm
