Mitsubishi Electric FR-A500 Instruction Manual page 122

<Function/operation changed by switching on-off the X12 (MRS) signal>
Operating Condition
Operation
Status
mode
During stop
PU
During
operation
During stop
External
During
operation
Note: 1. When the Pr. 79 setting is 7 and the PU operation interlock signal is OFF, network operation such
as computer link cannot be used.
2. 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.
3. 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 switched off with either of STF and STR on.
4. When an alarm occurs, the inverter can be reset by pressing the
panel.
5. When the MRS signal is used as the PU interlock signal, switching the MRS signal on and
rewriting the Pr. 79 value to other than 7 in the PU operation mode causes the MRS signal to
provide the ordinary MRS function (output stop). Also, as soon as 7 is set in Pr. 79, the MRS
signal acts as a PU interlock signal.
6. When the MRS signal is used as the PU external interlock signal, the signal logic conforms to the
Pr. 17 setting. When Pr. 17 = 2, read ON for OFF and OFF for ON in the above explanation.
(4) Operation mode external signal switching function
1) Preparation
Set "8" (switching to other than external operation mode) in Pr. 79. Using any of Pr. 180 to Pr. 186 (input
terminal function selection), allocate the terminal used to input the X16 (PU-external operation switching)
signal.
Refer to page 155 for Pr. 180 to Pr. 186 (input terminal function selection).
Note: When terminal assignment is changed using Pr. 180 to Pr. 186, the other functions may be affected.
Check the functions of the corresponding terminals before making setting.
2) Function
When the X16 signal is switched on in the PU operation mode, the operation mode is forcibly changed to
the external operation mode. When the X16 signal is switched off in external operation mode, the
operation mode is changed to the PU operation mode. When the X16 signal is switched off during network
operation such as computer link, the operation mode is changed to the PU operation mode as soon as the
switchover command to the external operation mode is sent from the computer. Note that this switchover
may only be made while the inverter is at a stop and cannot be made during operation.
X16 Signal
ON External operation mode (cannot be changed to the PU operation mode)
OFF PU operation mode (cannot be changed to the external operation mode)
Operation
X12 (MRS)
Mode
Signal
(Note 4)
ON OFF
(Note 3)
If external operation
External
frequency setting and start
ON OFF
signal are entered,
(Note 3)
operation is performed in
that status.
OFF ON
ON OFF
External
OFF ON
ON OFF
Operation Mode
Operating Status
During stop Enabled
Enabled
Disabled
During stop
Disabled
During operation
Disabled
Output stop
Output stop
Disabled
During operation
113
PARAMETERS
Switching
to PU
Parameter Write
Operation
Mode
disabled Disabled
disabled Disabled
disabled Enabled
disabled Disabled
disabled Disabled
disabled Disabled
STOP key of the operation
RESET
4