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4 APPLICABLE FUNCTIONS
4.2 Compliance with SEMI-F47 standard
Requirements of the SEMI-F47 standard
The following table shows the permissible instantaneous power failure time for the instantaneous power failure voltage.
Calculation method of tolerance against instantaneous power
failure
The following table shows the tolerance against instantaneous power failure when the instantaneous power failure voltage is
the rated voltage × 50 %, and the instantaneous power failure time is 200 ms.
Instantaneous maximum output means the power which the servo amplifier can output using maximum torque at the rated
speed. The margin can be examined by comparing the value of each condition with the instantaneous maximum output.
Even when the maximum torque is generated in actual operation, if the speed is low, the servo motor does not generate the
maximum output and the generated torque will instead be treated as a margin.
The following shows the conditions of tolerance against instantaneous power failure.
Delta connection
When the three phases (L1/L2/L3) are connected by delta connection, apply an instantaneous power failure to one of the
three pairs of line voltages (e.g. between L1 and L2).
Star connection
When the three phases (L1/L2/L3) are connected by star connection, from a total of six pairs of voltages, being (1) 3 pairs of
line voltages (between L1 and L2, L2 and L3, L3 and L1) and (2) 3 pairs of phases and a neutral point (between L1 and N, L2
and N, L3 and N), apply an instantaneous power failure to one pair of line voltages (e.g. between L1 and N).
Instantaneous power failure voltage
Permissible time for instantaneous power failure [s]
Rated voltage × 80 %
1
Rated voltage × 70 %
0.5
Rated voltage × 50 %
0.2
Servo amplifier model
Instantaneous maximum output [W]
Tolerance against instantaneous power
failure [W] (voltage drop between lines)
MR-J5-10_
350
250
MR-J5-20_
700
420
MR-J5-40_
1400
630
MR-J5-60_
1800
410
MR-J5-70_
3375
1150
MR-J5-100_
4000
1190
MR-J5-200_
6000
2040
MR-J5-350_
10500
2600
MR-J5-500_
15000
4100
MR-J5-700_
21000
5900
MR-J5W2-22G
1400 (700 × 2)
790
MR-J5W2-44G
2800 (1400 × 2)
1190
MR-J5W2-77G
6750 (3375 × 2)
2300
MR-J5W2-1010G
8000 (4000 × 2)
2400
MR-J5W3-222G
2100 (700 × 3)
970
MR-J5W3-444G
4200 (1400 × 3)
1700
MR-J5-60_4_
1800
190
MR-J5-100_4_
3500
200
MR-J5-200_4_
6000
350
MR-J5-350_4_
10500
730