Chapter 6 Function Introduction Shenzhen Hpmont Technology Co., Ltd
―114― HD30 Series Inverters User Manual
Auto current limiting function (F19.20
F19.22)
Auto current limiting function is used to limit the load current in real time smaller than the
current limiting threshold (F19.21). Therefore the inverter will not trip due to surge current. This
function is especially suitable for applications with big load inertia or big change of load.
In auto current limiting process, the inverter’s output frequency may change; therefore, it is
recommended not to enable this function when stable output frequency is required.
No. Name Description Range
factory setting
F19.20 Auto current limiting selection 0
2
1
0: Disabled.
1: Enabled in acceleration/deceleration operating process, but disabled in constant speed operating
process.
2: Enabled both in acceleration/deceleration operating process and in constant speed operating process.
• When the auto current limiting function is enabled, the output overload capacity will impaired if auto
current limiting threshold is set too low.
F19.21 Auto current limiting threshold 20.0
200.0
G
150%
P
110%
F19.21 defines the threshold of auto current limiting. It is a percentage of the inverter’s rated current.
F19.22 Deceleration time at auto current limiting 0.0
6000.0
15kW and below: 10.00s
18.5
55kW inverter: 30.00s
75kW and above: 60.00s
F19.22 defines the speed rate for the output frequency adjustment at auto current limiting action.
• If the setting is too small, it will not be easy to over the auto current limiting status and finally result in
overload fault.
• If the setting is too big, the frequency will change too sharply and therefore, the inverter may be in
generating status for a long time, which may result in overvoltage protection.
• If F19.22 is set to 0, it will not decelerate at current limiting.
F19.23 Enabled mode of terminal run command 0,1
0
0: Rise edge enabled mode.
• For many applications, the inverter is not allowed to auto-run to avoid device damage and ensure
safety due to no person interference at power on. In these applications, when the inverter’s power
is initialized and ready to run, it can not start to run until the terminal run command is given.
1: Level enabled mode.
• For certain applications, when ensured personal safety and device safety it need the inverter
immediately run at power on in order to provide automation and efficiency. In these application, the
inverter will immediately run as soon as the terminal run command is given whether before or after
power on.
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