9
1
1
Parameter Description
Parameter Description
During the automatic switchover, A: P.247 MC Switchover interlocking time; B: P.248 starting
waiting time; C:
P.57
restarting free operation time; D:
P.58
restarting elevating time.
Note: 1. When the motor runs at 50Hz (or 60Hz), the commercial power supply will offer a more efficient operation
than the inverter will. Moreover, during the inverter maintenance/inspection period, the commercial power
supply circuit should be installed to prevent the motor from being stopped for too long.
2. To prevent the inverter from setting off the over-current alarm when changing between the inverter
operation and the commercial power supply operation, the interlock measure has to be taken. Once the
motor stops, it will be activated via the inverter. Switchover and interlock can be carried out through the
inverter and a complicated commercial power supply if commercial power supply switchover sequence
function that can send out the signal for electromagnetic contactor actions is used.
5.59 Short Circuit Protection Function (P.287)
P.287 “Short circuit protection function selection”
Parameter
Factory setting
Setting range
Remarks
-
-
-
1
~
0
1
7
8
2
<Setting>
• Set
P.287 to 0 to cancel the output end short-circuits protection function.
•
When P.287 is set to 1, if the output end is short, the operation panel will display the “SCP”
abnormal alarm and the inverter will stop the output.
5.60 Alarm History Parameters (P.288~P.291)
P.288 “Alarm code display option”
P.289 “Abnormal code”
P.290 “Status message display option for the occurring alarm”
P.291 “Status message for the occurring alarm”
This paragraph provides the users with parameter-related information on alarm codes for frequency,
current, voltage, as well as the 12 alarm codes mentioned earlier. If
P.996
operation is executed,
the abnormal codes and the status messages for the occurred alarms recorded by this set of
parameters will be all cleared.
