Mitsubishi Electric 800 Series Instruction Manual (Function page 258

• Functions/operations by X12 (MRS) signal ON/OFF
Operating status
Operation
Status
mode
During stop
ON→OFF
PU/NET
During
ON→OFF
running
OFF→ON
During stop
ON→OFF
External
OFF→ON
During
running
ON→OFF
*1 The mode is switched to the External operation mode regardless of the ON/OFF state of the start signal (STF/STR). Thus, the motor runs under
the External operation mode when the X12 (MRS) signal turns OFF while the STF or STR signal is ON.
*2 When a fault occurs, the inverter can be reset by pressing the STOP/RESET key on the operation panel.
NOTE
• The operation mode cannot be switched to the PU operation mode with the start signal (STF/STR) ON state even if the X12
(MRS) signal turns ON.
• If the MRS signal is ON and Pr.79 is written to a value other than "7" when the MRS signal is used as the PU interlock signal,
the MRS signal will act as a regular MRS function (output stop). Also, when Pr.79 = "7", the MRS signal becomes the PU
interlock signal.
• The logic of the signal follows the Pr.17 MRS/X10 terminal input selection setting also when the MRS signal is used as the
PU operation interlock signal. When Pr.17 = "2 to 5", ON and OFF in the table above are reversed.
• 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.
 Switching operation mode by external signal (X16 signal)
• When External operation and the operation from the operation panel are used together, the PU operation mode and
External operation mode can be switched during a stop (during motor stop, start command OFF) by using the PU/External
operation switchover (X16) signal.
• When Pr.79 = "0, 6, or 7", switching between the PU operation mode and External operation mode is possible. (When
Pr.79 ="6", switchover is enabled during operation.)
• To input the X16 signal, set "16" in any parameter from Pr.178 to Pr.184 (Input terminal function selection) to assign
the function to a terminal.
X16 signal status and operation mode
Pr.79 setting
ON (External)
External operation
0 (initial value)
mode
1 PU operation mode
2 External operation mode
3, 4 External/PU combined operation mode
External operation
6
mode
X12 (MRS) External operation
ON mode
7
X12 (MRS)
External operation mode
OFF
NOTE
• The operation mode is determined by the setting of Pr.340 Communication startup mode selection and the ON/OFF state
of the X65 and X66 signals. (For the details, refer to
• The priority of Pr.79 and Pr.340 and signals is Pr.79 > X12 > X66 > X65 > X16 > Pr.340.
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Operation
X12 (MRS) signal
mode
*1
*2
External
*1
*2
External
OFF (PU)
PU operation mode
PU operation mode
PU operation mode
Operating status
If frequency and start commands are given
from external source, the inverter runs by
those commands.
During stop
Running→Output stop
Output stop→Running
Switching among the External, PU, and NET operation modes is
enabled.
Fixed at PU operation mode.
Fixed at External operation mode (Switching to NET operation mode
enabled).
Fixed at External/PU combined operation mode.
Switching among the External, PU, and NET operation mode is
enabled during operation.
Switching among the External, PU, and NET operation mode is
enabled (signal is OFF in the External operation mode).
Fixed at External operation mode (forcibly switched to External
operation mode).
page 258.)
11. (D) Operation Command and Frequency Command
Switching to PU or
NET operation mode
Disabled
Disabled
Enabled
Disabled
Disabled
Disabled
Remarks
11.1 Operation mode selection
11
12
13
14
15
16
17
18
19
20
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