MITSUBISHI ELECTRIC FR-S520 - Manual (Page 109)

100
(1) 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 (operation mode selection).
Set the terminal used for MRS signal input with any of Pr. 60 to Pr. 63 (input terminal
function selection).
Refer to page 88 for Pr. 60 to Pr. 63 (input terminal function selection).
REMARKS
When terminal assignment is changed using Pr. 60 to Pr. 63, the other functions
may be affected.
Check the functions of the corresponding terminals before making settings.
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
Operation
Mode
(*2)
Operating Status
Parameter
Write
Switching to
PU Operation
Mode
During
stop
ON
→
OFF
(*1)
During stop
Allowed
→
disallowed
Disallowed
PU
During
operation
ON
→
OFF
(*1)
PU
→
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