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Mitsubishi Electric FR-E520 Instruction Manual Page 137

Transistorized inverter.
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<Function/operation changed by switching on-off the MRS signal>
Operating
Condition
Operation
Status
mode
During
stop
PU
During
operation
During
stop
External
During
operation
Note: 1. If the MRS signal is on, the operation mode cannot be switched to the PU
operation mode when the start signal (STF, STR) is on.
2. 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 the external operation mode when the MRS
signal is switched off with either of STF and STR on.
3. When the protective function (major fault) is activated, the inverter can be
reset by pressing the
4. 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 operation
mode is switched to PU operation mode.
(3) Operation mode switching by external signal
1) Preparation
Set "8" (switching to other than external operation mode) in Pr. 79.
Use any of Pr. 180 to Pr. 183 (input terminal function selection) to set the terminal
used for X16 signal input.
Refer to page 161 for Pr. 180 to Pr. 183 (input terminal function selection).
Note: When terminal assignment is changed using Pr. 180 to Pr. 183, the other
functions may be affected.
Check the functions of the corresponding terminals before making settings.
2) Function
This switching is enabled during an inverter stop only and cannot be achieved
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
MRS
Mode
Signal
(Note 4)
ON → OFF
(Note 3)
External
ON → OFF
(Note 3)
OFF → ON
ON → OFF
External
OFF → ON
ON → OFF
STOP
key of the operation panel.
RESET
127
Operating Status
During stop
If external operation
frequency setting and
start signal are entered,
operation is performed
in that status.
During stop
During operation →
output stop
Output stop →
operation
Operation Mode
PARAMETERS
Switching to
Parameter
PU
Write
Operation
Mode
Enabled →
Disabled
disabled
Enabled →
Disabled
disabled
Disabled →
Enabled
disabled
Disabled →
Disabled
disabled
Disabled →
Disabled
disabled
Disabled →
Disabled
disabled
4

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