Mitsubishi Electric FR-A820-00046 Instruction Manual page 656

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(A) Application parameters
● Example of operation sequence with automatic bypass sequence
(Pr. 139 ≠ "9999", Pr. 159 = "9999")
Frequency command
INV
operation
Commercial
power supply
operation
Fig. 5-223:
● Example of operation sequence with automatic bypass sequence
(Pr. 139 ≠ "9999", Pr. 159 ≠ "9999")
ON
STF
OFF
Output frequency
Frequency command
Actual motor speed
ON
INV
MC3
operation
OFF
Commercial
ON
power supply
MC2
OFF
operation
A: Pr. 136 MC switchover interlock time
C: Pr. 57 Restart coasting time
Fig. 5-224:
Signal timing when there is automatic switchover sequence
5 - 476
ON
STF
OFF
Output frequency Pr.139
Actual motor speed
ON
MC3
OFF
ON
MC2
OFF
C
A: Pr. 136 MC switchover interlock time
C: Pr. 57 Restart coasting time
Signal timing when there is automatic switchover sequence
Pr. 139
C
A
B: Pr. 137 Start waiting time
D: Pr. 58 Restart cushion time
A
B: Pr. 137 Start waiting time
D: Pr. 58 Restart cushion time
Pr. 159
A
B
C
D
A
Parameters
Time
Time
A
B
C
D
Time
A
B
C
D
I002670E
Time
I002671E

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