Inovance MD280NT2.2GB - Page 133

Description of Function Codes MD280 User Manual
- 132 -
Function Code Parameter Name Setting Range Default
F5-18 Random PWM gain
0: Random PWM invalid
1–10
0
The setting of random PWM depth can make the shrill motor noise softer and reduce the
electromagnetic interference. If this parameter is set to 0, random PWM is invalid.
Function Code Parameter Name Setting Range Default
F5-19 PWM modulation mode
0: Asynchronous modulation
1: Synchronous modulation
0
Synchronous modulation is generally used at medium output frequency, which helps improve
the output voltage quality. This mode reduces the current ripple and electromagnetic noise
but increases the loss to switches.
Synchronous modulation takes effect only when the running frequency is higher than 85 Hz.
Function Code Parameter Name Setting Range Default
F5-20 Rapid current limit
0: Disabled
1: Enabled
1
7KHUDSLGFXUUHQWOLPLWIXQFWLRQFDQUHGXFH WKH$&GULYHV RYHUFXUUHQWIDXOWV DWPD[LPXP
guaranteeing uninterrupted running of the AC drive.
However, long-time rapid current limit may cause the AC drive to overheat, which is not
allowed. In this case, the AC drive will report Err40, indicating the AC drive is overloaded
and needs to stop.
Do not use this function for the hoist load.
Function Code Parameter Name Setting Range Default
F5-21 Wakeup frequency
'RUPDQWIUHTXHQF\)WR
PD[LPXPIUHTXHQF\)
0.00 Hz
F5-22 Wakeup delay time 0.0–6500.0s 0.0s
F5-23 Dormant frequency +]WRZDNHXSIUHTXHQF\) 0.00 Hz
F5-24 Dormant delay time 0.0–6500.0s 0.0s
These parameters are used to implement the dormant and wakeup functions in the water
supply application.
When the AC drive is in running state, the AC drive enters the dormant state and stops
DXWRPDWLFDOO\DIWHUWKHGRUPDQWGHOD\WLPH)LIWKHVHWIUHTXHQF\LVORZHUWKDQRUHTXDO
WRWKHGRUPDQWIUHTXHQF\)
When the AC drive is in dormant state and the current running command is effective, the AC
GULYHVVWDUWVXSDIWHUWKH ZDNHXSGHOD\WLPH)LIWKHVHWIUHTXHQF\LVKLJKHUWKDQRU
HTXDOWRWKHZDNHXSIUHTXHQF\)
Generally, set the wakeup frequency equal to or higher than the dormant frequency. If the
wakeup frequency and dormant frequency are set to 0, the dormant and wakeup functions
are disabled.
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