Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 377

• Functions/operations by X12 (MRS) signal ON/OFF
Operating status
Operation
Status
mode
During stop
PU/NET
During
running
During stop
External
During
running
*1 The mode is switched to the External operation mode regardless of the ON/OFF state of the start signals (STF, STR). Thus, the motor runs under
the External operation mode when the X12 (MRS) signal turns OFF with either of STF or STR in an ON state.
*2 When a fault occurs, the inverter can be reset by pressing
NOTE
• The operation mode cannot be switched to the PU operation mode with the start signal (STF, STR) in an ON state even if the
X12 (MRS) signal is 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 setting of Pr.17 MRS input selection also when the MRS signal is used as the PU operation
interlock signal. When Pr.17 = "2", ON and OFF in the above explanation are reversed.
• 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.
 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 of Pr.178 to Pr.189 (Input terminal function selection) to assign the function to
a terminal.
Pr.79 setting
0 (initial value)
1
2
3, 4
6
X12 (MRS)
ON
7
X12 (MRS)
OFF
NOTE
• The status of the operation mode follows the Pr.340 Communication startup mode selection setting 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.
376
5. PARAMETERS
5.9 (D) Operation command and frequency command
X12 (MRS) signal
*1
ON→OFF
External
*1
ON→OFF
OFF→ON
ON→OFF
External
OFF→ON
ON→OFF
X16 signal status and operation
mode
ON (External) OFF (PU)
External operation PU operation
mode mode
PU operation mode
External operation mode
External/PU combined operation mode External/PU combined operation mode fixed
External operation PU operation
mode mode
External operation PU operation
mode mode
External operation mode
Operation
Operating status
mode
If frequency and start commands are given
*2
from external source, the inverter runs by
those commands.
During stop
*2
Running→Output stop
Output stop→Running
on the operation panel.
Switching among the External, PU, and NET operation modes is enabled
PU operation mode fixed
External operation mode fixed (Switching to NET operation mode
enabled)
Switching among the External, PU, and NET operation mode is enabled
while running.
Switching among the External, PU, and NET operation mode is enabled.
(In the External operation mode, output shutoff.)
External operation mode fixed (Forcibly switched to External operation
mode)
page 377.)
Switching to PU or
NET operation mode
Not available
Not available
Available
Not available
Not available
Not available
Remarks