Mitsubishi Electric 800 Series Instruction Manual page 264

Life alarm display and signal output (Y90 signal, Pr.255)
POINT POINT
• In the life diagnosis of the main circuit capacitor, the alarm signal (Y90) is not output unless measurement by turning OFF the
power supply is performed.
• Whether or not the parts of the control circuit capacitor, main circuit capacitor, cooling fan, or inrush current limit circuit have
reached the life alarm output level can be checked with Pr.255 Life alarm status display and the Life alarm (Y90) signal.
bit 15 7
0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
Pr.255
bit 3
Decimal Binary
15 1111 
14 1110 
13 1101 
12 1100 
11 1011 
10 1010 
9 1001 
8 1000 

7 0111

6 0110

5 0101

4 0100

3 0011

2 0010

1 0001

0 0000
: With warnings, : Without warnings
• The Life alarm (Y90) signal turns ON when any of the control circuit capacitor, main circuit capacitor, cooling fan, or inrush
current limit circuit reaches the life alarm output level.
• For the terminal used for the Y90 signal, set "90" (positive logic) or "190" (negative logic) in any of Pr.190 to Pr.196 (Output
terminal function selection).
NOTE
• When using an option (FR-A8AY, FR-A8AR, FR-A8NC, FR-A8NCE), the life can be output separately to the Control circuit
capacitor life (Y86) signal, Main circuit capacitor life (Y87) signal, Cooling fan life (Y88) signal, and Inrush current limit circuit
life (Y89) signal.
• 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.
Life display of the inrush current limit circuit (Pr.256) (Standard models)
• The life of the inrush current limit circuit (relay, contactor and inrush resistor) is displayed in Pr.256.
• The number of contact (relay, contactor, thyristor) ON times is counted, and it is counted down from 100% (0 time) every
1%/10,000 times. As soon as 10% (900,000 times) is reached, Pr.255 bit 3 is turned ON and also a warning is output to the
Y90 signal.
0
1
bit0 Control circuit capacitor life
bit1 Main circuit capacitor life
(Standard models)
bit2 Cooling fan life
bit3 Inrush current limit circuit life
(Standard models)
bit 2 bit 1 bit 0
  

 

 
 


 
 

 

  
  

 

 
 


 
 

 

  
(E) Environment setting parameters
• Pr.255 read • Pr.255 setting read
Bit image is displayed
in decimal
PARAMETERS
5
GROUP
E
263