85
4. Parameter description
Parameter
4.28 Zero Current Detection (P.62, P.63)
P.62 “Zero current detection level”
P.63 “Zero current detection time”
Related parameters
P.40 “Multi-function output
terminal pattern”
P.85 “Function selection for
multi-function relay”
Parameter
Factory setting
Setting range
Remarks
62
5%
0~200%, 9999
9999: function invalid
63
0.5s
0.05~1s, 9999
9999: function invalid
<Setting>
• Assume that the rated full-load current of the inverter is 20A, P.62=5% and P.63=0.5s, in this case
if the output current is lower than 20
×
5%=1A for more than 0.5s, a signal(OMD) is output, which
is depicted in the figure below.
Note: 1. The frequency can be varied by RH (acceleration) and RM (deceleration) between 0 and the maximum
frequency. The upper limit of the setting frequency is the maximum frequency, shown as follows:
P.1
Output
frequency
Setting frequency
0Hz
Hz
Acceleration
（
RH
）
Deceleration
（
RH
）
Forward rotationSTF
）
ON
ON
ON
2. When the acceleration or deceleration signal is ‘on’, the output frequency acceleration/deceleration times
are determined by P.7 (first acceleration time) and P.8 (first deceleration time) (When RT is ‘off’).
3. When P.44 ≠ 9999 (second acceleration time) and P.45 ≠ 9999 (second deceleration time), the
acceleration/deceleration times are due to P.44, P.45.
4. When the start signal (STF/STR) is ‘off’, if RH (acceleration)/RM (deceleration) is ‘on’, the target
frequency will also change.
5. When the start signal(STF/STR) becomes ‘off’ from ‘on’, or changing the frequency continually through
RH/RM, please make the frequency setting storage function invalid (P.61=2,3).
6. If the frequency setting storage function is valid (P.61=1), the life of the EEPROM will be shorten
because of frequent write frequency into the EEPROM.
7. Signals RH, RM and RL are determined by P.80~P.84, P.86. If the functions of the terminals are changed,
other functions are likely to be affected. Please make sure the functions of the terminals before changing
their functions.
