Maintenance Timer Alarm; Current Average Value Monitor Signal - Mitsubishi Electric FR-A800 Series Instruction Manual

5.7.20 Maintenance timer alarm

The Maintenance timer (Y95) signal is output when the inverter's cumulative energization time reaches the time period set with
the parameter. MT1, MT2 or MT3 is displayed on the operation panel. This can be used as a guideline for the maintenance
time of peripheral devices.
Pr.
503
Maintenance timer 1
E710
504 Maintenance timer 1
E711 warning output set time
686
Maintenance timer 2
E712
687 Maintenance timer 2
E713 warning output set time
688
Maintenance timer 3
E714
689 Maintenance timer 3
E715 warning output set time
Maintenance
timer 1
(Pr. 503)
Operation example of the maintenance timer 1 (Pr.503, Pr.504) (with both MT2 and MT3 OFF)
• The cumulative energization time of the inverter is stored in the EEPROM every hour and displayed in Pr.503 (Pr.686,
Pr.688) in 100 h increments. Pr.503 (Pr.686, Pr.688) is clamped at 9998 (999800 h).
• When the value in Pr.503 (Pr.686, Pr.688) reaches the time (100 h increments) set in Pr.504 (Pr.687, Pr.689), the
Maintenance timer (Y95) signal is output, and also "
displayed on the operation panel.
• 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).
NOTE
• The Y95 signal turns ON when any of MT1, MT2 or MT3 is activated. It does not turn OFF unless all of MT1, MT2 and MT3
are cleared.
• If all of MT1, MT2 and MT3 are activated, they are displayed in the priority of "MT1 > MT2 > MT3".
• The cumulative energization time is counted every hour. Energization time of less than 1 h is not counted.
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.190 to Pr.196 (Output terminal function

5.7.21 Current average value monitor signal

The output current average value during constant-speed operation and the maintenance timer value are output to the Current
average monitor (Y93) signal as a pulse. The output pulse width can be used in a device such as the I/O unit of a programmable
controller as a guideline for the maintenance time for mechanical wear, belt stretching, or deterioration of devices with age.
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Name Initial value
0
9999
0
9999
0
9999
First power ON
9998
Set "0" in Pr.503
(999800h)
Pr.504
OFF ON
Y95 signal
MT1 display
selection)page 473
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Setting range
Displays the inverter's cumulative energization time in
increments of 100 h (read-only). Writing the setting of "0"
0 (1 to 9998)
clears the cumulative energization time while Pr.503 = "1 to
9998". (Writing is disabled when Pr.503 = "0".)
Set the time until the Maintenance timer (Y95) signal is output.
0 to 9998
"MT1" is displayed on the operation panel.
9999 Without the function
0 (1 to 9998) The same function as Pr.503.
0 to 9998
The same function as Pr.504.
"MT2" is displayed on the operation panel.
9999
0 (1 to 9998) The same function as Pr.503.
0 to 9998
The same function as Pr.504.
"MT3" is displayed on the operation panel.
9999
Time
ON
" (MT1), "
Description
" (MT2), or " " (MT3) is
5. PARAMETERS
5.7 (E) Environment setting parameters
1
2
3
4
5
6
7
8
9
10
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