Cooling-Fan Speed Drop Signal (Waf) (C021 To C026, B092 To D022); Starting Contact Signal (Fr) (C021 To C026); Heat Sink Overheat Warning Signal (Ohf) (C021 To C026, C064) - Hitachi SJ700-4000HFU2 Instruction Manual

Chapter 4
4.2.69 Cooling-fan speed drop signal (WAF)
The inverter outputs the cooling-fan speed drop (WAF) signal when
it detects that the rotation speed of its internal cooling fan has
fallen to 75% or less of the full speed.
If "01" has been selected for the cooling fan control (b092), the inverter will not output the WAF signal, even when
the cooling fan stops.
If the WAF signal is output, check the cooling-fan cover for clogging.
You can monitor the state of the WAF signal by using the life-check monitoring function (d022).
Item
Terminal function
Alarm relay terminal function
4.2.70 Starting contact signal (FR)
The inverter outputs the starting contact (FR) signal while it is
receiving an operation command.
The FR signal is output, regardless of the setting of the run command source setting (A002).
If the forward operation (FW) and reverse operation (RV) commands are input at the same time, the inverter stops the
motor operation.
Item
Terminal function
Alarm relay terminal function
Forward operation command
Reverse operation command
Starting contact signal (FR)
4.2.71 Heat sink overheat warning signal (OHF)
The inverter monitors the temperature of its internal heat sink, and
outputs the heat sink overheat warning (OHF) signal when the
temperature exceeds the heat sink overheat warning level (C064).
Item
Terminal function
Alarm relay terminal function
Heat sink overheat warning level
Function code
C021 to C025
C026
Function code
C021 to C025
C026
Function code Data or range of data
C021 to C025
C026
C064 0. to 200. ( °C)
4-68
Explanation of Functions
Related code
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
b092: Cooling fan control
d022: Life-check monitoring
Data
WAF: Cooling-fan speed
40
drop signal
Related code
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
Data
41 FR: Starting contact signal
Related code
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
C064: Heat sink overheat warning level
OHF: Heat sink overheat warning
42
signal
Setting of the threshold temperature
at which to output the heat sink
overheat warning signal
Description
Description
Description