Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Parameter Special operation
FR-A700 EC 6 - 509
6.24.3 Load torque high speed frequency control (Pr. 4, Pr. 5, Pr. 270 bis Pr. 274)
Load torque high speed frequency control is a function which automatically sets the operational
maximum frequency according to the load. More specifically, the magnitude of the load is judged
according to the average current at a certain time after starting to perform operation at higher
than the preset frequency under light load.
This function is designed to increase speed automatically under light load, for example to mi-
nimize the incoming/outgoing time in a multi-story parking lot.
When Pr. 570 Multiple rating setting
≠
"2", performing all parameter clear and inverter reset
changes the setting range. (Refer to section 6.7.5).
I001623E
Fig. 6-253: Reduction of vibrations in vertikal motion applications
Pr. No. Name
Werks-
einstellung
Initial
Value
Description Parameters referred to
Refer to
Section
4
Multi-speed setting
(high speed)
50Hz 0–400Hz Set the higher-speed frequency
4–6
24–27
59
79
128
178–189
Multi-speed setting
Remote function
selection
Operation mode
selection
PID action selection
Input terminal func-
tion selection
6.10.1
6.10.4
6.22.1
6.24.1
6.14.1
5
Multi-speed setting
(middle speed)
30 Hz 0–400 Hz Set the lower-speed frequency
270
Stop-on contact/load tor-
que high-speed frequency
control selection
0
0 Normal operation
1
Stop-on-control
(refer to section 6.13.4)
2
Load torque high speed fre-
quency control
3
Stop-on-contact (refer to sec-
tion 6.13.4) + load torque high
speed frequency control
271
High-speed setting maxi-
mum current
50% 0–220%
Set the upper and lower limits of
the current at high and middle
speeds.
272
Untere Stromgrenze für
mittlere Frequenz
100% 0–220%
273
Current averaging range 9999
0–400Hz
Average current during accele-
ration from (Pr. 273 × 1/2) Hz to
(Pr. 273) Hz can be achieved.
9999
Average current during accele-
ration from (Pr. 5 × 1/2) Hz to
(Pr. 5) Hz is achieved.
274
Current averaging filter
time constant
16 1–4000
Set the time constant of the pri-
mary delay filter relative to the
output current.
The time constant [ms] is
0.75 × Pr. 274 and the initial
value is 12ms.
A larger setting provides higher
stability but poorer response.
Without high-speed frequency control With high-speed frequency control
Whether there is a load or not, the
lift is moved vertically at the same
speed The lift with a light load or without a load
is moved faster than the lift with a load.
(The output frequency is increased.)
Light
Faster