Emheater EM12 Series, User Manual

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5.Description of Function Codes EM12 User's Manual
44
b2-16
Forward/Reverse rotation dead-zone time Default 0.0s
Setting Range 0.0~3000.0s
It is used to set the time when the output is 0 Hz at transition of the frequency inverter forward rotation and reverse
rotation, as shown in the following figure.
Diagram 5-9 Forward/Reverse rotation dead-zone time
b2-17
Running mode when set frequency less than limited lower
frequency Default 0
Setting
Range
0 Run at frequency lower limit
1 Stop
2 Run at zero speed
It is used to set the frequency inverter running mode when the set frequency is lower than the frequency lower limit.
The EM12 provides three running modes to satisfy requirements of various applications.
b2-18
Droop control Default 0.00Hz
Setting Range
0.00Hz~10.00 Hz
This function is used for balancing the workload allocation when multiple motors are used to drive the same load. The
output frequency of the frequency inverters decreases as the load increases. You can reduce the workload of the
motor under load by decreasing the output frequency for this motor, implementing workload balancing among
multiple motors.
b2-19
Terminal JOG priority Default 0
Setting
Range
0 Disabled
1 Enabled
It is used to set whether terminal JOG is priority.
If terminal JOG is priority, the frequency inverter switches to terminal JOG running state when there is a terminal
JOG command during the running process of the frequency inverter.
b2-20
Setting power-on time reach threshold Default 0h
Setting Range 0~65000 h
If the accumulative power-on time (b9-08) reaches the value set in this parameter, thecorresponding DO terminal
output ON signal.
For example, combining virtual DI/DO functions, to implement the function that the frequency inverter reports an
alarm when the actual accumulative power-on time reaches the threshold of 100 hours, perform the setting as follows:
1.
Set virtual DI1 to user-defined fault 1: b7-00 = 44.
2. Set that the valid state of virtual DI1 is from virtual DO1: b7-05 = 0000.
3. Set virtual DO1 to power-on time reached: b7-11= 24.
4. Set the accumulative power-on time reach threshold to 100 h: b2-20 = 100 h.
Then, the frequency inverter alarm output Err27 when the accumulative power-on time reaches 100 hours.