Mitsubishi Electric FR-E700 Instruction Manual page 368

Selection of operation mode and operation location
PU operation interlock (Pr. 79 = 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 ac-
cidentally 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" to any of Pr. 178 to Pr. 184 "Input terminal function selection" to assign the func-
tion. (Refer to section 6.10.1 for Pr. 178 to Pr. 184.) When the X12 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
ON
OFF
Tab. 6-55: Function of the X12 signal
Function/operation changed by switching on-off the X12 (MRS) signal
Operation Condition
Operation
Mode
PU/NET
External
Tab. 6-56: Switching the X12 (MRS) signal
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.
At alarm occurrence, pressing the STOP/RESET key of the operation panel resets the inverter.
NOTES
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 inter-
lock 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. 184 "Input terminal function selection" may
affect the other functions. Please make setting after confirming the function of each terminal.
6 - 214
Function/Operation
Operation Mode
Operation mode (external, PU, NET)
switching enabled
Output stop during external operation
Forcibly switched to external operation mode
External operation allowed.
Switching to PU or NET operation mode disabled
X12 (MRS) Operation
Signal
Status
During
ON OFF
stop
External
Running ON OFF
OFF ON
During
stop
ON OFF
External
OFF ON
Running
ON OFF
Parameter Write
Parameter write enabled (depending on Pr. 77
"Parameter write selection" and each parameter
write condition
(Refer to Tab. 6-1 for the parameter list.)
Parameter write disabled with exception of Pr. 79
Operating Status
Mode
If external operation frequency setting
and start signal are entered, operation is
performed in that status.
Stop
During operation
Output stop During operation
Switching to PU, NET
Operation Mode
Disallowed
Disallowed
Enabled
Disallowed
output stop Disallowed
Disallowed
Parameter