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Chapter 8 Application
8-29
Cx2000 AC Drive
8.21 2 Phase PWM drive
Group
Code Item
Set Value
Setting
Range
Initial
Unit
Function group 2
H48
PWM controlling mode
0: NORMAL PWM
1: 2 phase PWM
1
0 ~ 1
0
Heat loss and leakage current from inverter can be reduced when H48 is set to 1(2 phase PWM)
according to the ratio of load, but the motor noise will increase.
8.22 Cooling fan control
Group
Code Item
Set
Value
Setting
Range
Initial
Unit
Function group 2
H77
Cooling fan control
1
0 ~ 1
0
Control the On/ Off of the cooling fan to cool the Inverter heat sink.
When it is set to 0:
-. Cooling fan begins to operate when power ON.
-. Cooling fan is stopped when inverter main circuit voltage becomes low voltage due to power off.
When it is set to 1:
-.Cooling fan begins to operate when power is turned ON with operating command ON.
-. Cooling fan is stopped when operating command is turned Off with inverter output shut off.
-. Cooling fan keeps operating when heat sink temperature exceeds a certain limit regardless of
operating command.
-. Make the inverter power off, and cooling fan will stop when the voltage of main loop inside the
inverter is under low voltage.
-. Used when frequent Run/Stop or quite stop is required. This may make the cooling fan life longer.
8.23 Operating mode select when cooling fan trip occurs
Group
Code
Item
Set Value
Setting Range Initial Unit
Function
group 2
H78
Operating mode when
cooling fan trip occurs
-
0 ~ 1
1
-
I/O group
I55
Multi-function relay select
18
0 ~ 19
17
-
Select 0 or 1 in H78 code.
If H78 code is set to 0 (continuous operation), alarm can be output in I54 when cooling fan trip
occurs.
Summary of Contents for C*2000 Series
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