Mitsubishi Electric FR-A700 Series, Technical Manual

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418
PARAMETER
(2) Operation
1) Input signal function
2) Output signal function
3) When performing bypass operation
Cancel an operation interlock signal (by turning
ON MRS signal). When signal CS is OFF, bypass
operation is performed.
4) When performing inverter operation
Cancel an operation interlock signal (by turning
ON MRS signal), and turn ON CS signal. By
turning ON/OFF the inverter's start signal (STF
(STR)) , perform inverter operation.
5) When switching from inverter operation to bypass
operation
Turn ON
→
OFF CS signal.
6) When switching from bypass operation to inverter
operation
Turn OFF
→
ON CS signal, and turn ON the
inverter's start signal (STF (STR)). If an
instantaneous power failure function is set at this
time, smooth switchover without decreasing the
motor speed is performed.
7) When switching to bypass operation at inverter
fault
When [
Pr. 138 = 1 ], the operation automatically
switches to commercial operation if an inverter
fault has occurred during inverter operation.
Note that automatic switchover can not be made if
E.CPU appears.
Signal Terminal Used Functions 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/electronic
bypass switchover
*2
ON ........Inverter running {
×
{
OFF ......Bypass operation { {
×
STF
(STR)
STF
(STR)
Inverter operation
command
(invalid for bypass
operation)
*3
ON ........Forward rotation (reverse
rotation)
{
×
{
OFF ......Stop {
×
{
OH
Set 7 in any of
[
Pr. 180 to 189
]
External thermal relay
input
ON ........Motor normal {
— —
OFF ......Motor error
× × ×
RES RES
Operating status
initialization
*4
ON ........Initialization No change
×
No change
OFF ......Normal operation {
— —
*1 Unless the MRS signal is turned ON, neither commercial power supply 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 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
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Operation interlock
㧔 MRS)
Inverter/bypass
㧔 CS)
Inverter run command
㧔 STF)
[ Pr.136, 137 ]
[ Pr.136 ]
Inverter input side MC
(MC1)
Inverter output side MC
(MC3)
MC for bypass
operation (MC2)
Operation timing example of the MC