Mitsubishi Electric FR-A700 Technical Manual page 385

• Operation sequence example without automatic switchover sequence ([Pr. 139 = 9999])
ON
Power supply
OFF
Operation interlock ON
(MRS) OFF
Inverter run command ON
(STF) OFF
ON
Inverter/bypass (CS)
OFF
ON
Inverter input side MC
(MC1)
OFF
ON
Inverter output side MC
(MC3)
OFF
ON
MC for bypass
operation (MC2)
OFF
Each timer
Operating status
(motor speed)
• Operation sequence example with automatic switchover sequence ([Pr. 139
ON
STF
OFF
Output frequency [Pr. 139]
Frequency command
Actual motor speed
INV
ON
MC3
operation
OFF
ON
Bypass
MC2
operation
OFF
A : [Pr. 136] MC switchover interlock time
C : [Pr. 57] Restart coasting time
• Operation sequence example with automatic switchover sequence ([Pr. 139
ON
STF
OFF
Output frequency [Pr. 139]
Frequency command
Actual motor speed
INV
ON
MC3
operation
OFF
Bypass ON
MC2
operation
OFF
C
A : [Pr. 136] MC switchover interlock time
C : [Pr. 57] Restart coasting time
OFF only at inverter alarm
[Pr. 57] [Pr. 136]
Bypass
INV
Coasting
operation
operation
C A
B : [Pr. 137] Start waiting time
D : [Pr. 58] Restart cushion time
[Pr. 159]
A A B C
B : [Pr. 137] Start waiting time
D : [Pr. 58] Restart cushion time
419
ON : Operation enabled
OFF: Operation disabled
ON : Forward rotation
OFF: Stop
ON : Inverter operation
OFF: Bypass operation
[Pr. 137] [Pr. 58]
[Pr. 136] [Pr. 57]
INV
Coasting Stop
operation
9999], [Pr. 159 = 9999])
A B
9999], [Pr. 159
D A A
PARAMETER
Indicates the delay time until
the MC turns ON (OFF).
[Pr.136] MC switchover interlock time
[Pr.137] MC3 start (waiting time)
[Pr. 57] Reset time
[Pr. 58] Switchover cushion time
Time
Time
C D
9999])
Time
Time
B C D
2