Mitsubishi Electric FR-D720-008 Instruction Manual page 173

(8) Switchover mode (setting "6")
While continuing operation, you can switch among the PU operation, External operation and Network operation (NET
operation).
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 the 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 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" to any of Pr. 178 to Pr. 182 (input terminal
function selection) to assign the function. (Refer to page 111 for Pr.178 to Pr.182.)
When the X12 signal is not assigned while MRS signal is assigned, function of the MRS signal switches from output stop
to 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
External operation allowed
OFF
Switching between the PU and Network operation
mode is enabled
<
Function/operation changed by switching ON/OFF the X12 (MRS) signal
Operating Condition
Operation
Status
Mode
During
PU/NET stop
Running
During
stop
External
Running
∗1
The operation mode switches to the 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
Selection of operation mode and operation location
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 command) or like 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 the Network operation mode through communication.
Rotation direction is the same as that of External operation.
The value set with the setting potentiometer (frequency 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 or 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 the Network operation mode through communication.
Rotation direction and set frequency are the same as those of PU operation.
Send the mode change command to the External operation mode through communication.
The rotation direction is determined by the input signal of the External operation.
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 the Network operation mode are used
unchanged.
Operation Mode
Operation
X12 (MRS) Signal
Mode
OFF ∗1
ON
External ∗2
OFF ∗1
ON
OFF ON
ON OFF
External ∗2
OFF ON
ON OFF
of the operation panel resets the inverter.
Switching Operation/Operating Status
Function/Operation
Parameter write enabled (depending on Pr. 77 Parameter
write selection and each parameter write conditions
(Refer to page 54 for the parameter list))
Parameter write disabled with exception of Pr. 79
>
Operating Status
If external operation frequency setting and
start signal are entered,
performed in that status.
During stop
During operation output stop
Output stop operation
Parameter Write
Switching to PU,
NET Operation
Mode
Not Allowed
operation is
Not Allowed
Allowed
Not Allowed
Not Allowed
Not Allowed
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