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Useful functions
4.22.3 Maintenance timer alarm (Pr. 503, Pr. 504)
⋅ The cumulative energization time of the inverter is stored into the EEPROM every hour and indicated in Pr. 503
Maintenance timer in 100h increments. Pr. 503 is clamped at 9998 (999800h).
⋅ When the Pr. 503 value reaches the time set in Pr. 504 Maintenance timer alarm output set time (100h increments), the
maintenance timer alarm output signal (Y95) is output.
⋅ For the terminal used for the Y95 signal output, assign the function by setting "95" (positive logic) or "195" (negative
logic) in any of Pr. 190 to Pr. 196 (output terminal function selection).
When the cumulative energization time of the inverter reaches the parameter set time, the maintenance timer
output signal (Y95) is output. (MT) is displayed on the operation panel (FR-DU07).
This can be used as a guideline for the maintenance time of peripheral devices.
Parameter
Number
Name Initial Value Setting Range Description
503 Maintenance timer 0 0 (1 to 9998)
Displays the cumulative energization time
of the inverter in 100h increments.
Reading only
Writing the setting of "0" clears the
cumulative energization time.
504
Maintenance timer alarm output
set time
9999
0 to 9998
Set the time taken until when the
maintenance timer alarm output signal
(Y95) is output.
9999 No function
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 190.)
CAUTION
⋅ The cumulative energization time is counted every hour. The energization time of less than 1h is not counted.
⋅ Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection) may affect the other functions.
Please set parameters after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 190 to Pr. 196(output terminal function selection) Refer to page 128
First power ON
Maintenance
timer
(Pr. 503)
Set "0" in Pr.503
Y95 signal
MT display
OFF ON
Time
ON
Pr.504
9998
(999800h)