5.3 Description of Function Codes 5.3.5 H codes (High performance functions)
Maintenance interval (M1)
Cumulative motor run time 1
Reference function code: H81 Warning selection 1
Specify the maintenance interval in hours with the maintenance interval (M1) (H78).
• Data setting range: 1 to 99990 hours (set in 10 hour increments)
Maintenance timer “MNT” (Function code E20 to E24, E27, data = 84)
When the cumulative motor run time 1 (H94) reaches the value specified by the maintenance interval (H78), the
inverter outputs the maintenance timer signal “MNT”. Furthermore, by assigning warnings with H81, rTe appears
on the keypad when the set time is reached, and warning “L-ALM” is output to notify the user.
Cumulative motor run time 1 (H94)
The cumulative run time of the motor can be indicated by keypad operation. It can be used for management of the
machinery or maintenance. Specifying an arbitrary time for the cumulative motor run time 1 (H94) allows an arbitrary
value to be specified for the cumulative motor run time. It can be replaced with the initial data to use as a guide for
the replacement of machine parts or inverter. Setting “0” allows the cumulative motor run time to be reset.
<For half yearly maintenance>
If the maintenance interval is reached, set a new value in H78 and press the key to reset the output
signal and restart measurement.
This function is exclusively applied to the 1st motor.
Input during operation with commercial power supply (Motor 1 to 4) “CRUN-M1 to 4” (Function code
E01 to E09, data = 72 to 75)
Even when a motor is driven by commercial power, not by the inverter, it is possible to count the cumulative motor
run time 1 to 4 (H94, A51, b51, r51) by detecting the ON/OFF state of the auxiliary contact of the magnetic contactor
for switching to the commercial power line.
Check the cumulative motor run time with 5_23 on Menu #5 “Maintenance Information” of the keypad.
Cumulative motor run time (H94)
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