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

Useful functions
6.21.3

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

When the cumulative energizing time of the inverter reaches the parameter set time, the main-
tenance 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.
Pr. No. Name
503
Maintenance timer
Maintenance timer
504
alarm output set time
The above parameters can be set when Pr. 160 = 0.
Fig. 6-218: Maintenance timer
The cumulative energizing time of the inverter is stored into the E²PROM every hour and indi-
cated in Pr. 503 "Maintenance timer" in 100h increments. Pr. 503 is clamped at 9998 (999800h).
When the Pr. 503 value reaches the time set to 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" (source logic)
or "195" (sink logic) to any of Pr. 190 to Pr. 196 "Output terminal function selection".
NOTES
The cumulative energizing time is counted every hour. The energizing time of less than 1h is
not counted.
When terminal assignment is changed using Pr. 190 to Pr. 196 "Output terminal function
selection", the other functions may be affected. Please make setting after confirming the
function of each terminal.
6 - 394
Initial Setting
Description
Value Range
Display the cumulative energizing time
of the inverter in 100h increments.
Reading only
0 0 (1–9998) When Pr. 503 = "1 to 9998", writing the
setting value of "0" clears the cumula-
tive energization time.
(Writing is disabled when Pr. 503 = "0")
Set the time taken until when the
0–9998 maintenance timer alarm output signal
9999
(Y95) is output.
9999 No function
First power
9998
(999800h)
Maintenance timer
(Pr. 503)
Pr. 504
Y95 signal
OFF
("MT" display)
ON
Set "0" in Pr. 503
ON OFF
Parameters referred to
190–196 Output terminal
function selection
Time
ON
Parameter
Refer to
Section
6.9.5
I001263E