4-129
Figure 4.3.63 Minimum B.B time and momentary power loss time
Minimum base block time (07-18) is also used to search the speed and DC braking
function.
.
Set the minimum base block time required (07-18).
.
Execute speed search or DC braking function, if over-current "OC" has ever occurred,
you can increase the setting.
. After the search of speed activated in this setting is completed, it begins the speed
search of momentary power loss and normal situation.
07- 19
Speed Direction Search Operating Current
Range
【
0~100】%
07- 20
Speed Search Operating Current
Range
【
0~100】%
07- 21
Integral time of speed searching
Range
【
0.1~10.0】Sec
07- 22
Delay time of speed searching
Range
【
0.0~20.0】Sec
07-23
Voltage recovery time
Range
【
0.1~5.0】Sec
07- 24
Bidirection Speed Search Selection
Range
【
0】:invalid
【1】:valid
07- 26
Mechanical braking selection
Range
【
0】:invalid
【1】:valid
Speed search function is used to find the actual speed and smoothly start from the speed detected. It is
valid when the power is re-supplied after the momentary power failure and when it restarts after failure
occurrence.
If the search speed is enabled under the V / F + PG or SV control mode (with PG control), then the
inverter will be started from the detected frequency.
. Set the multi-function digital input terminal to external speed search command 1 or 2. External speed
search command 1 (set value = 19) and 2 (set value = 34) can not be set at the same time, otherwise
"SE02" (digital input terminal error) warning may occur.
If executing speed search by the use of external search command, it is a must to ensure that the speed
search command is earlier than operation command, or at least ensure it is effective together with the
operation command at the same time. A typical operation sequence is shown in the Figure 4.3.64.
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