RUN
F
DT1
Output Terminal [DO1]
8-8-10
Capacitor Life Warning Signal (WAC)
Use this signal to determine the life expectancy of the internal capacitor based on the inverter’s inter-
nal temperature, conduction time, and the capacity of the capacitor.
By turning bit 4 of Protection/Maintenance Function Mode Selection (3008Hex-63Hex) ON, the service
life of the capacitor is judged to have reached its end when any one of the following conditions is satis-
fied, and W
AC (Capacitor life warning signal) is turned ON.
• The capacity of the capacitor becomes 85 % or below the factory default value.
• The conduction time exceeds 61,000 hours (7 years) in all models of the HND mode “A2022/037,
A4022/040, AB002-022” and ND mode.
• The conduction time exceeds 87,000 hours (10 years) in models other than the above.
The capacity of the capacitor can be monitored by Main Circuit Capacitor’s Capacitor Monitor
(3010Hex-4CHex), and the conduction time by Cumulative Run Time of Electrolytic Capacitors on PC
Board (3003Hex-4DHex).
This function is set based on A-8 Smoothing Capacitor Life Curve on page A-291.
The time until the service life of the main circuit capacitor is reached (in 10 hours) is displayed in Serv-
ice Life of Main Circuit Capacitor Remaining Time (3008Hex-4EHex).
Parameter No. Function name Data Default data Unit
3008Hex-63Hex
Protection/Maintenance Func-
tion Mode Selection
Bit 4: Judge main circuit ca-
pacitor life
0: Disable
1: Enable
- -
3005Hex-15Hex/
3005Hex-1CHex
Output Terminal [DO1] Func-
tion Selection/Output Terminal
[ROA, ROB] Function Selec-
tion
240: WAC (Capacitor life
warning signal)
- -
Method for Comparing the Main Circuit Capacitor's Capacity and
the Default V
alue during Shipment from Factory
When bit 3 = 0 at Protection/Maintenance Function Mode Selection (3008Hex-63Hex), follow the
measurement procedure below to measure the capacitance of the main circuit capacitor when the
power supply is cut off, and compare the value with the default value at the time of shipment from the
factory
. The measurement result is displayed as a percentage (%) with respect to the default value at
the time of shipment from the factory.
8 Other Functions
8-85
M1 Series EtherCAT Type User’s Manual (I670)
8-8 Functions Related to Protection, Warning and Various Output Signals
8
8-8-10 Capacitor Life Warning Signal (WAC)
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