Download Print this page

Advertisement

Special operation and frequency control
(2) Electronic bypass operation sequence
Operation sequence example when there is no 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 when there is automatic switchover sequence (Pr. 139
STF
Output frequency Pr.139
Frequency command
Actual motor speed
INV
MC3
operation
Bypass
MC2
operation
A : Pr.136 MC switchover interlock time
C : Pr.57 Restart coasting time
Operation sequence example when there is automatic switchover sequence (Pr. 139
ON
STF
OFF
Output frequency Pr.139
Frequency command
Actual motor speed
ON
INV
MC3
operation
OFF
ON
Bypass
MC2
operation
OFF
A : Pr.136 MC switchover interlock time
C : Pr.57 Restart coasting time
234
Off only at inverter fault
Pr.136
Pr.57
INV
Coasting
operation
ON
OFF
ON
OFF
ON
OFF
C
A
C
A
B : Pr.137 Start waiting time
D : Pr.58 Restart cushion time
Pr.137
Pr.58
Pr.136
Pr.57
Bypass
INV
Coasting
Stop
operation
operation
B : Pr.137 Start waiting time
D : Pr.58 Restart cushion time
Pr.159
A
B
C
D
A
ON : Operation enabled
OFF: Operation disabled
ON : Forward rotation
OFF: Stop
ON : Inverter operation
OFF: Bypass operation
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
"9999", Pr. 159 = "9999")
Time
Time
A
B
C
D
"9999", Pr. 159
A
B
C
D
"9999")
Time
Time

Advertisement

Comments to this Manuals

Symbols: 0
Latest comments: