Under the control of DCS4-20mA signal, the current fluctuation at the AC input terminal of the inverter is large. The reason may be that the user signal source is unstable or the DC signal is interfered by external interference. The frequency specified by DCS may not be configured correctly, resulting in the inability of the inverter to respond.
Current fluctuation caused by the given simulated signal of DCS
Under the control of DCS4-20mA signal, the current fluctuation at the AC input terminal of the inverter is large, which may be due to the instability of the user signal source or the interference of external signals on the DC signal.
Problem that the DCS frequency-controlled inverter does not respond to the given frequency
The frequency given by DCS may not be configured correctly, resulting in the inability of the inverter to respond.
"Please connect high voltage" issue
Long-term delay may cause the inverter to fail to close the switch in time after the high-voltage disconnection, which may cause equipment damage.
System output overcurrent and overload problems
System overcurrent or overload output may be caused by line voltage fluctuations, load surges or failure of the sampling circuit.
Module DC overvoltage problem
If the shutdown and deceleration time is too fast, it may cause the DC voltage of the module to be too high.
The remote (DCS) status variable of the inverter switch does not show any problems.
DCS connection or relay failure may cause the status value to not be displayed.
The frequency converter with instantaneous stop function reports that the instantaneous stop time is too long during operation.
The failure of the signal detection board may lead to momentary stoppage or output overload problems.