Maintenance Timer Alarm (Pr. 503, Pr. 504) - Mitsubishi Electric FR-F740-00023 Instruction Manual

Useful functions

4.21.3 Maintenance timer alarm (Pr. 503, Pr. 504)

When the cumulative energization time of the inverter reaches the parameter set time, the maintenance timer
output signal (Y95) is output.
This can be used as a guideline for the maintenance time of peripheral devices.
Parameter
Number
503 Maintenance timer
Maintenance timer alarm output
504
set time
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 173.)
Maintenance
timer
(Pr. 503)
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).
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 make setting after confirming the function of each terminal.
Parameters referred to
Pr. 190 to Pr. 196(output terminal function selection)
254
(MT) is displayed on the operation panel (FR-DU07).
Name Initial Value
9999
First power ON
9998
(999800h)
Pr.504
OFF
Y95 signal
MT display
Refer to page 116
Setting Range
0 0 (1 to 9998)
0 to 9998
9999
Set "0" in Pr.503
ON ON
Description
Displays the cumulative energization time
of the inverter in 100h increments.
Reading only
Writing the setting of "0" clears the
cumulative energization time.
Set the time taken until when the
maintenance timer alarm output signal
(Y95) is output.
No function
Time