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Maintenance parameters
2
FUNCTIONS
1) H1 (Pr. 503) "maintenance timer"
•The cumulative energization time of the inverter is stored into the E
2
PROM every
hour and indicated in 1000h increments. (Cannot be written.)
•The maintenance timer is clamped at 999 (999000h).
2) H2 (Pr. 504) "maintenance alarm output set time"
•Set the time when the maintenance timer alarm signal (Y95) is output.
•The setting unit is 1000h.
3) Maintenance timer alarm signal (Y95)
•Made valid by setting "95" (maintenance timer alarm output signal) in Pr. 64 or Pr.
65 (output terminal function selection).
•If the value set in H2 is equal to or greater than the H1 setting, the maintenance
timer alarm output (Y95) turns off.
2.12.2 Current average value monitor signal
(H3 , H4 , H5 )
The parameter number in parentheses is the one for use with the parameter unit (FR-PU04).
REMARKS
The factory setting (36000h) is the guideline for the main circuit smoothing capacitor life (about 10
years in the operating environment of 40
°C (104°F) ambient temperature, 10h/day, and 365 days/
year) of the inverter. The lifetime changes depending on the operating environment of the inverter.
♦Related parameters♦
• Assignment of Y95 signal to terminal ⇒ Pr. 64 "RUN terminal function selection", Pr. 65 "A, B, C
terminal function selection" (Refer to page 100)
The average value of the output current during constant speed operation and
the maintenance timer value (maintenance parameter H1) are output as pulses
to the current average value monitor signal (Y93).
The pulse width measured by inputting the signal to the I/O module of the PLC
or the like can be used as a guideline for increase in output current due to
abrasion of peripheral machines and elongation of belt and for aged
deterioration of peripheral devices to know the maintenance time.
The current average value monitor signal (Y93) is output as pulse for 20s as 1
cycle and repeatedly output during constant speed operation.
Parameter Name Factory Setting Setting Range Remarks
H3 (555) Current average time 1s 0.1 to 1s
Setting is
enabled when
Pr. 30 = "1"
H4 (556) Data output mask time 0s 0 to 20s
H5 (557)
Current average value monitor
signal output reference current
1A 0.1 to 999A
PLC
Output unit
Input unit
Maintenance
time
Parts have
reached their life
Inverte
r