Mitsubishi Electric FR-A700 EC, Instruction Manual

Page: 527 / 826

Parameter Operation selection at power failure
FR-A700 EC 6 - 347
Connection and parameter setting
Remove the jumpers across terminals R/L1-R1/L11 and across terminals S/L2-S1/L21, and
connect the terminal R1/L11 to the terminal P/+ and the terminal S1/L21 to the terminal N/
−
(the
inverter’s internal control circuit is then powered by the DC bus).
When Pr. 261 is set to "1" or "2", the inverter decelerates to a stop if an under voltage or power
failure occurs.
Operation outline of deceleration to stop at power failure
If an under voltage or power failure occurs, the output frequency is dropped by the frequency set
to Pr. 262 .
Deceleration is made in the deceleration time set to Pr. 264. (The deceleration time setting is the
time required from Pr. 20 "Acceleration/deceleration reference frequency" to a stop.)
When the frequency is low and enough regeneration energy is not provided, for example, the
deceleration time (slope) from Pr. 265 to a stop can be changed.
Fig. 6-163:
Connection
I001172E
I001173E
Fig. 6-164: Parameters for stop selection at power failure
Inverter
Power
supply
Remove the jumpers!
Short terminals
R1/L11 and P/+ and
S1/L21 and N/
−
Output
frequency
Pr. 266
Time
Power
supply
Pr. 262
Pr. 264
Pr. 265