PARAMETERS
112
2) Function
MRS Signal Function/Operation
ON
Output stopped during external operation.
Operation mode can be switched to PU operation mode.
Parameter values can be rewritten in PU operation mode.
PU operation allowed.
OFF
Forcibly switched to external operation mode.
External operation allowed.
Switching to PU operation mode inhibited.
<Function/operation changed by switching on-off the MRS signal>
Operating Condition
Operation
mode
Status
MRS Signal
Opera-
tion
Mode
(Note
4)
Operating Status
Parameter
Write
Switching to
PU Operation
Mode
During stop
ON
→
OFF
(Note 3)
During stop
Allowed
→
disallowed
Disallowed
PU
During
operation
ON
→
OFF
(Note 3)
External
If external operation
frequency setting
and start signal are
entered, operation is
performed in that
status.
Allowed
→
disallowed
Disallowed
OFF
→
ON
Disallowed
→
disallowed
Allowed
During stop
ON
→
OFF
During stop
Disallowed
→
disallowed
Disallowed
OFF
→
ON
During operation
→
output stop
Disallowed
→
disallowed
Disallowed
External
During
operation
ON
→
OFF
External
Output stop
→
operation
Disallowed
→
disallowed
Disallowed
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
STOP
RESET
key of the control panel.
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.
4
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