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The input signals are as indicated below.
Signal Terminal Used
Operation enable/disable
MRS
MRS
selection
CS
CS
Inverter/bypass
Inverter operation command
STF
STF(STR)
(STR)
(Invalid for bypass)
Set "7" in any of
OH
External thermal relay input
Pr. 180 to Pr. 189.
Operating status initialization
RES
RES
*4
*1
Unless the MRS signal is turned on, neither bypass operation nor inverter operation can be performed.
*2
The CS signal functions only when the MRS signal is on.
*3
STF (STR) functions only when both the MRS signal and CS signal are on.
*4
The RES signal enables reset input acceptance selection using Pr. 75 Reset selection/disconnected PU detection/PU stop selection.
*5
MC1 turns off when an inverter fault occurs.
*6
MC operation
: MC-ON
: MC-OFF
: Inverter operation .................................................. MC2 is off and MC3 is on
Bypass operation ................................................... MC2 is on and MC3 is off
No change : The status before the signal turns on or off is held.
The output signals are as indicated below.
Terminal Used
Signal
(Pr. 190 to Pr. 196 setting)
MC1
MC2
MC3
Function
*1
*2
*3
Control signal output of inverter input side magnetic
17
contactor MC1
Control signal output of bypass operation magnetic
18
contactor MC2
Control signal output of inverter output side
19
magnetic contactor MC3
Special operation and frequency control
Operation
ON ..... Bypass-inverter operation
enabled
OFF ... Bypass-inverter operation
disabled
ON...... Inverter operation
OFF ... Bypass operation
ON...... Forward rotation (reverse
rotation)
OFF .... Stop
ON ..... Motor normal
OFF .... Motor abnormal
ON...... Initialization
OFF .... Normal operation
Description
MC Operation
*6
MC2
MC3
MC1
*5
No
change
No
No
change
change
233
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