YASKAWA E7U Programming Manual page 162

Parameter
Parameter Name
No.
Digital Operator Display
Internal Dynamic Braking Resis-
L8-01 tor Protection Selection
DB Resistor Prot
Overheat Pre-Alarm Level
L8-02
OH Pre-Alarm Lvl
Overheat Pre-Alarm Operation
L8-03 Selection
OH Pre-Alarm Sel
Input Phase Loss Detection Level
L8-06
Ph Loss In Lvl
Output Ground Fault Detection
L8-09 Selection
Ground Fault Sel
Heatsink Cooling Fan Operation
L8-10 Selection
Fan On/Off Sel
Heatsink Cooling Fan Operation
L8-11 Delay Time
Fan Delay Time
Ambient Temperature Setting
L8-12
Ambient Temp
OL2 Characteristic Selection at
L8-15 Low Speeds
OL2 Sel @ L-Spd
Soft CLA Selection
L8-18
Soft CLA Sel
OH Frequency Reference
L8-19 Reduction Level
Fref During OH
OH1 Detection Selection for Fan
L8-32 Failure
OH1 Detect Sel
Table A.1
Parameter List (Continued
Description
Hdwe Protection
0: Not Provided
1: Provided
When the cooling fin temperature exceeds the value set
in this parameter, an overheat pre-alarm (OH) will
occur.
Drive Operation upon OH Pre Alarm Detection.
0: Ramp to Stop (Decel Time C1-02).
1: Coast to Stop
2: Fast-Stop (Decel Time = C1-09).
3: Alarm Only
*0 to 2 is recognized as fault detection, and 3 is
recognized as alarm. (For the fault detection, the fault
contact operates.)
4: OH Alarm & Reduce (Continue operation and reduce
output frequency by L8-19)
Monitors the DC Bus current ripple and activates when
one of the input phases is lost (PF).
Enables and disables Drive output ground fault
detection.
0: Disabled
1: Enabled
Controls the Heatsink Cooling Fan Operation.
0: Fan On-Run Mode (Fan will operate only when
Drive is running and for L8-11 seconds after RUN is
removed).
1: Fan Always On (Cooling fan operates whenever
Drive is powered up.)
When L8-10=0 this parameter sets a delay time for
Cooling Fan de-energization after the run command is
removed.
When the Drive is installed in an ambient temperature
exceeding its rating, Drive overload (OL2) protection
level is reduced.
This parameter assists in protecting the output transistor
junctions from overheating when output current is high
and output frequency is low.
0: Disabled
1: Enabled (L8-18 is active)
Enables and disables current limit "A"
0: Disabled
1: Enabled.
Sets the amount of frequency reference reduction when
an Overheat Pre-alarm (OH) is detected.
Selects the drive response upon failure of the internal
cooling fan.
0: Disabled
FAN alarm is displayed
1: Enabled
OH1 fault occurs
Parameters A - 22
)
Setting Factory
Range Setting
0 or 1 0
50 to 130
95°C
0 to 4 4
0.0 to 25.0 5.0%
0 or 1 1
0 or 1 0
0 to 300 300sec
45 to 60°C 45°C
0 or 1 1
0 or 1 1
0.0
to 20.0%
100.0
0 or 1 1
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