7-9-27
Protection/Maintenance Mode Selection Function
Main circuit capacitor life judgment selection, main circuit capacitor life judgment, inrush current pre-
vention resistor overheat detection, and braking transistor broken detection operations can be select-
ed and set as combined operations.
Parameter No. Function name Data Default data Unit
H98
Protection/Mainte-
nance Function Mode
Selection
0 to 255 80 -
Set function settings as binary values to their respective bits, and set the resulting data as decimal
data to Protection/Maintenance Function Mode Selection (H98).
The following shows the settings of each bit and each function.
Bit Function Data = 0 Data = 1
Bit 0 to 2 Reserved - -
Bit 3
Main circuit capacitor life judgment stand-
ards selection
Default value User setting
Bit 4 Judge main circuit capacitor life Disable Enable
Bit 5
Detect inrush current prevention resistor
overheat
Enable Disable
Bit 6 Braking transistor error detection Continuous running Alarm processing
Bit 7 Reserved - -
Use the reserved bit fixed at 0.
Below are the details of each function.
Main circuit capacitor life judgment selection (Bit 3)
Either of the factory default standards or user setting standards can be selected as the criteria level for
judging the life of the main circuit capacitor
.
When user setting standards are selected, the reference level must be measured and set beforehand.
For details, refer to
7-8-10 Capacitor Life W
arning Signal (WAC) on page 7-96.
Judge main circuit capacitor life (Bit 4)
To judge the life of the main circuit capacitor, measure the discharge time when the power supply is
shut of
f. The discharge time is determined by the capacity of the main circuit capacitor and the inver-
ter's internal load. Accordingly
, accurate measurement is not possible when the inverter's internal load
conditions fluctuate considerably
. Life is also sometimes judged erroneously in some conditions. To
prevent erroneous judgment of the life of the main circuit capacitor, life judgment based on the dis-
charge time of the main circuit capacitor can be disabled (life judgment based on incrementation of the
time that voltage is applied to the main circuit capacitor continues to stay active). For details, refer to
7-8-14 Lifetime Alarm (LIFE) on page 7-100.
When using the control power supply auxiliary inputs, the load varies considerably. For this reason,
during run operation, either disable life judgment and then enable life judgment after aligning condi-
tions at periodic inspection, or measure by a method matched to actual usage conditions.
7 Other Functions
7-157
M1 Series Standard Type User's Manual (I669)
7-9 Other Operation Functions
7
7-9-27 Protection/Maintenance Mode Selection Function
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