9.2 Details of Function Codes
9-63
Chap. 9 FUNCTION CODES
H98 Protection/Maintenance Functions (Selection) Refer to F26.
Specifies a combination between the output phase loss protection, input phase loss protection
and lowering of automatic carrier frequency.
Data for H98 Output phase loss Input phase loss Automatic lowering of carrier frequency
0 Disable Disable Disable
1 Disable Disable Enable
2 Disable Enable Disable
3 Disable Enable Enable
4 Enable Disable Disable
5 Enable Disable Enable
6 Enable Enable Disable
7 Enable Enable Enable
Output phase loss protection (
RN
)
The inverter will enter Alarm mode activated by the output phase loss protection, and issue the
alarm 0PL if it detects an output phase loss while it is running.
If a magnetic contactor that has been inserted in the inverter output circuits switches off when
the inverter is running, this protection will not be activated.
Input phase loss protection (
NKP
)
The inverter will enter Alarm mode and issue an alarm (
NKP
) if a phase loss is detected in the
three-phase input power source.
Do not enable this protection with inverters with single-phase input, as it is not effective.
When operating an inverter with a three-phase input with a single phase for testing purposes,
this protection may be disabled, but only if the load can be reduced.
Automatic lowering of carrier frequency
When using an inverter in a critical system or any other systems where inverter operation
should not be interrupted, select this feature to protect the system from failures which could
result from the inverter tripping due to the heat sink overheating (
J
) or overload (
NW
),
abnormally high ambient temperature or a cooling mechanism failure. This feature lowers the
output frequency before the inverter enters Alarm mode, however, the level of motor noise may
increase.
To Next Page
Loading...
