Mitsubishi Electric FR-E 500 Instruction Manual page 123

(2) PU operation interlock
PU operation interlock forces the operation mode to be changed to the external
operation mode when the MRS signal switches off. This function prevents the inverter
from being inoperative by the external command if the mode is accidentally left
unswitched from the PU operation mode.
1) Preparation
! Set "7" in Pr. 79 (PU operation interlock).
! Set the terminal used for MRS signal input with any of Pr. 180 to Pr. 183 (input
terminal function selection).
Refer to page 148 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
MRS Signal
ON
OFF
<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
Function/Operation
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.
Forcibly switched to external operation mode.
External operation allowed.
Switching to PU operation mode inhibited.
Opera-
tion
MRS Signal
Mode
(Note 4)
ON → OFF
(Note 3)
External
ON → OFF
(Note 3)
OFF → ON
ON → OFF
External
OFF → ON
ON → OFF
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 →
During operation
108
PARAMETERS
Switching to
Parameter
PU Operation
Write
Mode
Allowed →
Disallowed
disallowed
Allowed →
Disallowed
disallowed
Disallowed →
Allowed
disallowed
Disallowed →
Disallowed
disallowed
Disallowed →
Disallowed
disallowed
Disallowed →
Disallowed
disallowed