295
Special operation and frequency control
4
PARAMETERS
⋅The input signals are as indicated below.
⋅The output signals are as indicated below.
Signal Terminal Used Function Operation MC Operation *6
MC1 *5 MC2 MC3
MRS MRS Operation enable/disable
selection *1
ON .....Bypass-inverter operation
enabled ⎯⎯
OFF ...Bypass-inverter operation
disabled ×No
change
CS CS Inverter/bypass *2
ON......Inverter operation ×
OFF ...Bypass operation ×
STF
(STR) STF(STR) Inverter operation command
(Invalid for bypass) *3
ON......Forward rotation (reverse
rotation) ×
OFF....Stop ×
OH Set "7" in any of
Pr. 180 to Pr. 189.External thermal relay input ON .....Motor normal ⎯⎯
OFF....Motor abnor mal ×××
RES RES Operating status initialization
*4
ON......Initialization No
change ×No
change
OFF....Normal oper ation ⎯⎯
*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.
Signal Terminal Used
(Pr. 190 to Pr. 196 setting) Description
MC1 17 Control signal output of inverter input side magnetic
contactor MC1
MC2 18 Control signal output of bypass operation magnetic
contactor MC2
MC3 19 Control signal output of inverter output side
magnetic contactor MC3