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Selection of operation mode and
operation location
(8) Switch-over mode (Setting "6")
While continuing operation, you can switch among PU operation, External operation and Network operation (when
RS-485 terminals or communication option is used).
Operation Mode Switching
External operation
PU
operation
External operation
NET
operation
PU operation
external
operation
PU operation
NET
operation
NET operation
external
operation
NET operation
PU
operation
(9) PU operation interlock (Setting "7")
The PU operation interlock function is designed to forcibly change the operation mode to External operation mode
when the PU operation interlock signal (X12) input turns off. This function prevents the inverter from being
inoperative by the external command if the mode is accidentally left unswitched from the PU operation mode.
Set "7" (PU operation interlock) in Pr. 79.
For the terminal used for X12 signal (PU operation interlock signal) input, set "12" in any of Pr. 178 to Pr. 189 (input
terminal function selection) to assign the function. (Refer to page 110 for Pr. 178 to Pr. 189.)
When the X 12 signal has not been assigned, the function of the MRS signal switches from MRS (output stop) to
the PU operation interlock signal.
X12 (MRS)
Signal
Operation mode (external, PU, NET) switching
ON
enabled
Output stop during external operation
Forcibly switched to External operation mode
OFF
External operation allowed.
Switching to PU or NET operation mode disabled
<Function/operation changed by switching ON/OFF the X12 (MRS) signal>
Operating Condition
Operation
Status
mode
During stop
PU/NET
Running
During stop
External
Running
*1
The operation mode switches to External operation mode independently of whether the start signal (STF, STR) is on or off. Therefore, the
motor is run in External operation mode when the X12 (MRS) signal is turned off with either of STF and STR on.
*2
At fault occurrence, pressing
CAUTION
If the X12 (MRS) signal is on, the operation mode cannot be switched to PU operation mode when the start signal (STF, STR) is on.
When the MRS signal is used as the PU interlock signal, the MRS signal serves as the normal MRS function (output stop) by
turning on the MRS signal and then changing the Pr. 79 value to other than "7" in the PU operation mode. Also as soon as "7"
is set in Pr. 79, the signal acts as the PU interlock signal.
When the MRS signal is used as the PU operation interlock signal, the logic of the signal is as set in Pr. 17. When Pr. 17 = "2",
read ON as OFF and OFF as ON in the above explanation.
Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Please
make setting after confirming the function of each terminal.
180
Select the PU operation mode with the operation panel or parameter unit.
Rotation direction is the same as that of external operation.
The frequency set with the potentiometer (frequency setting command), etc. is used unchanged. (Note
that the setting will disappear when power is switched off or the inverter is reset.)
Send the mode change command to Network operation mode through communication.
Rotation direction is the same as that of external operation.
The value set with the setting potentiometer (frequency setting command) or like is used unchanged.
(Note that the setting will disappear when power is switched off or the inverter is reset.)
Press the external operation key of the operation panel, parameter unit.
The rotation direction is determined by the input signal of the external operation.
The set frequency is determined by the external frequency command signal.
Send the mode change command to Network operation mode through communication.
Rotation direction and set frequency are the same as those of PU operation.
Send the mode change command to External operation mode through communication.
Rotation direction is determined by the external operation input signal.
The set frequency is determined by the external frequency command signal.
Select the PU operation mode with the operation panel or parameter unit.
The rotation direction and frequency command in Network operation mode are used unchanged.
Operation mode
X12 (MRS)
Operation
Signal
Mode
ON OFF
*1
External
ON OFF
*1
OFF ON
ON OFF
External
OFF ON
ON OFF
of the operation panel resets the inverter.
Switching Operation/Operating Status
Function/Operation
Parameter write enabled (Pr. 77 Parameter write
selection, depending on the corresponding parameter
write condition (Refer to page 55 for the parameter list))
Parameter write disabled with exception of Pr. 79
Operating Status
If external operation frequency setting and start signal
*2
are entered, operation is performed in that status.
During stop
*2
During operation
output stop
Output stop
operation
Parameter write
Switching to
PU, NET
Operation Mode
Disallowed
Disallowed
Enable
Disallowed
Disallowed
Disallowed

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