Chapter 7 Maintenance and Troubleshooting
JT550 Series Inverter Manua
l
- 96 -
If the output current of the inverter is within the positive and negative amplitudes of any current
reaching detection value, the corresponding output terminal becomes ON.
The JT550 provides two groups of any current reaching detection parameters, including current
detection value and detection amplitudes, as shown in the following Figure .
F4.42
Timing function
Range:0~1
Default:0
0: Disabled
1: Enabled
F4.43
Timing duration source
Range:0~3
Default:0
0:F4.44
1:AI1
2:AI2
3:AI3(100% of analog input corresponds to the value of F4.44)
F4.44
Timing duration
Range:0.0Min~6500.0Min
Default:0.0Min
These parameters are used to implement the inverter timing function.
If F4.42 is set to 1, the inverter starts to time at startup. When the set timing duration is reached, the
inverter stops automatically and meanwhile the corresponding DO becomes ON.
The inverter starts timing from 0 each time it starts up and the remaining timing duration can be
queried by H0.28.
The timing duration is set in F4.43 and F4.44, in unit of minute.
F4.45
AI1 input voltage lower
limit
Range:0.00V~F4.46
Default:3.10V
F4.46
AI1 input voltage upper
limit
Range:F4.45~10.00V
Default:6.80V
These two parameters are used to set the limits of the input voltage to provide protection on the
inverter. When the AI1 input is larger than the value of F4.46 or smaller than the value of F4.45, the
corresponding output terminal becomes ON, indicating that AI1 input exceeds the limit.
F4.47
Module temperature
threshold
Range:0~100
Default:75℃
When the heatsink temperature of the inverter reaches the value of this parameter, the corresponding
output terminal becomes ON, indicating that the module temperature reaches the threshold.
F4.48
Cooling fan control
Range:0~1
Default:0
It is used to set the working mode of the cooling fan. If this parameter is set to 0, the fan works when
the inverter is in running state. When the inverter stops, the cooling fan works if the heatsink temperature is
higher than 40
°
C, and stops working if the heatsink temperature is lower than 40
°
C.
If this parameter is set to 1, the cooling fan keeps working after power on.
