SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
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Chapter 4 Explanation of Functions<br />
4.2.69 Cooling-fan speed drop signal (WAF)<br />
Related code<br />
The inverter outputs the cooling-fan speed drop (WAF) signal<br />
C021 to C025: Terminal [11] to [15] functions<br />
C026: Alarm relay terminal function<br />
when it detects that the rotation speed of its internal cooling fan b092: Cooling fan control<br />
has fallen to 75% or less of the full speed.<br />
d022: Life-check monitoring<br />
If "01" has been selected for the cooling fan control (b092), the<br />
inverter will not output the WAF signal, even when the cooling fan<br />
stops.<br />
If the WAF signal is output, check the cooling-fan cover for clogging.<br />
You can monitor the state of the WAF signal by using the life-check monitoring function (d022).<br />
Item Function code Data Description<br />
Terminal function<br />
C021 to C025<br />
WAF: Cooling-fan speed<br />
40<br />
Alarm relay terminal function<br />
C026<br />
drop signal<br />
4.2.70 Starting contact signal (FR)<br />
Related code<br />
C021 to C025: Terminal [11] to [15] functions<br />
C026: Alarm relay terminal function<br />
The inverter outputs the starting contact (FR) signal while it is<br />
receiving an operation command.<br />
The FR signal is output, regardless of the setting of the run command source setting (A002).<br />
If the forward operation (FW) and reverse operation (RV) commands are input at the same time, the<br />
inverter stops the motor operation.<br />
Item Function code Data Description<br />
Terminal function<br />
C021 to C025<br />
FR: Starting contact<br />
41<br />
Alarm relay terminal function<br />
C026<br />
signal<br />
Forward operation command<br />
Reverse operation command<br />
Starting contact signal (FR)<br />
4.2.71 Heat sink overheat warning signal (OHF)<br />
The inverter monitors the temperature of its internal heat sink,<br />
and outputs the heat sink overheat warning (OHF) signal when<br />
the temperature exceeds the heat sink overheat warning level<br />
(C064).<br />
Related code<br />
C021 to C025: Terminal [11] to [15] functions<br />
C026: Alarm relay terminal function<br />
C064: Heat sink overheat warning level<br />
Item Function code Data or range of data Description<br />
Terminal function<br />
C021 to C025<br />
OHF: Heat sink overheat warning<br />
42<br />
Alarm relay terminal function<br />
C026<br />
signal<br />
Setting of the threshold<br />
Heat sink overheat warning level C064 0. to 200. (℃) temperature at which to output the<br />
heat sink overheat warning signal<br />
4 - 69
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