5.3 Description of Function Codes 5.3.5 H codes (High performance functions)
• If the retry count exceeds 3 times (H04 = 3), and an integrated alarm is output
• The auto-reset operation can be monitored from the external equipment by assigning the digital output signal
TRY to any of the programmable, output terminals [Y1] to [Y4], [Y5A/C] or [30A/B/C]. Set function code E20 to
E24 or E27 to “26” (during “TRY” retry operation).
Cooling fan ON-OFF control
To prolong the service life of the cooling fan and reduce fan noise during running, the cooling fan stops when the
temperature inside the inverter drops below a certain level while the inverter stops.
H06 specifies whether to keep running the cooling fan all the time or to enable ON/OFF control.
Disable (normal operation) (factory default)
Enable (ON/OFF controllable)
Cooling fan ON-OFF control “FAN” assignment (Function code E20 to E24, E27 data = 25)
With the cooling fan ON/OFF control enabled (H06 = 1), this output signal is ON when the cooling fan is in operation,
and OFF when it is stopped. This signal can be used to make the cooling system of peripheral equipment interlocked
for an ON/OFF control.
Curve acceleration/ deceleration (Refer to F07)
Curve acceleration/deceleration settings are described in detail in the function code F07 section.
Rotation direction restriction
H08 inhibits the motor from running in an unexpected rotational direction due to miss-operation of run commands,
miss-polarization of frequency commands, or other mistakes.
Enable (reverse rotation inhibited)
Enable (Forward rotation inhibited)
Under sensorless vector control, the motor may rotate a little in the direction other than that specified due to an
error in the estimated speed due to a motor constant error.
Tripped state reset
command
Inverter output
frequency
Alarm output (for any alarm)
[ALM]
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