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370
Special operation and frequency control
(1) Connection diagram
⋅ The following shows the connection diagram of a typical electronic bypass sequence. Sink logic, Pr. 185 = "7", Pr.
192 = "17", Pr. 193 = "18", Pr. 194 = "19"
⋅ Operations of magnetic contactors (MC1, MC2, MC3)
Electronic bypass sequence connection diagram
*1 Take caution for the capacity of the sequence output terminal.
The used terminal changes depending on the setting of Pr. 190 to
Pr. 196 (output terminal function selection).
*2 When connecting a DC power supply, insert a protective diode.
When connecting an AC power supply, connect a relay output
option (FR-A7AR) and use a contact output.
*3 The used terminal changes depending on the setting of Pr. 180 to
Pr. 189 (input terminal function selection).
CAUTION
⋅ Use the bypass operation function in External operation mode. Be sure to connect the other power supply since the function is
not performed normally unless the connection terminals R1/L11, S1/L21 are not connected to the other power supply (power
supply that does not pass MC1).
⋅ Be sure to provide mechanical interlocks for MC2 and MC3
.
Magnetic
Contactor
Installation Place
Operation ({: Shorted, ×: Open)
Bypass operation
During inverter
operation
At an inverter fault
occurrence
MC1
Between power supply and
inverter input
×
(Shorted by reset)
MC2 Between power supply and motor
×
×
(Can be selected using
Pr. 138, always open
when external thermal
relay is ON)
MC3
Between inverter output and
motor
×
×
Inverter start
(forward rotation)
MC1
R/L1
S/L2
T/L3
STF
R1/L11
S1/L21
CS
MRS
RES
10
2
5
U
V
W
External
thermal relay
IM
(MC1)IPF
(MC2)OL
SE
MC3
MC2
24VDC
MC1
External
thermal reset
Frequency
setting signal
(MC3)FU
Inverter/bypass
operation interlock
MC2
MC3
*3
*1
*2
*1
*1
JOG(OH)
MCCB
MC2
MC3
SD
Output Terminal Capacity
Output Terminal
Permissible Load
Inverter open collector output
(RUN, SU, IPF, OL, FU)
24VDC 0.1A
Inverter relay output (A1-C1, B1-
C1, A2-B2, B2-C2)
Relay output option (FR-A7AR)
230VAC 0.3A
30VDC 0.3A