Mitsubishi Electric FR-E700EX Instruction Manual page 193

(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 drive unit 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.184 (input terminal
function selection) to assign the function. (Refer to page 138 for Pr.178 to Pr.184.)
 When the X12 signal is not assigned, function of the MRS signal switches from MRS (output stop) to PU operation
interlock signal.
X12 (MRS)
Signal
Operation mode (External, PU, NET) switching enabled
ON
Output stop during External operation
Forcibly switched to External operation mode
External operation allowed
OFF
Switching between the PU and NET 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

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.

At fault occurrence, pressing
NOTE
 If the X12 (MRS) signal is ON, the operation mode cannot be switched to the 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. As
soon as "7" is set to Pr.79 , the MRS signal acts as the PU interlock signal.
 When the MRS signal is used as the PU 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.184 (input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Selection of operation mode and operation location
Operation Mode
Operation
X12 (MRS) Signal
Mode
ON OFF
External
ON OFF
OFF ON
ON OFF
External
OFF ON
ON OFF
of the operation panel resets the drive unit.
Function/Operation
Parameter Write
Parameter write enabled (depending on Pr.77 Parameter
write selection and each parameter write conditions (Refer
to page 52 for the parameter list))
Parameter write disabled with exception of Pr.79
Operating Status
If external operation speed setting and start
signal are entered, operation is performed in
that status.
During stop
During operation  output stop
Output stop  operation
Switching to PU,
NET Operation
Mode
Disallowed
Disallowed
Allowed
Disallowed
Disallowed
Disallowed
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