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Operation selection function
(1) PU operation interlock
The PU operation interlock function is designed to forcibly change the operation
mode to 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 PU operation mode.
1) Preparation
•
Set "7" (PU operation interlock) in Pr. 79.
•Set the terminal used for MRS signal input with any of Pr. 60 to Pr. 63 (input terminal
function selection).
Refer to page 109 for Pr. 60 to Pr. 63 (input terminal function selection).
2) Function
<Function/operation changed by switching on-off the MRS signal>
CAUTION
Changing the terminal assignment using Pr. 60 to Pr. 63 (input terminal
function selection) may affect the other functions.
Check the functions of the corresponding terminals before making settings.
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.
Operating Condition
MRS
Signal
Operation
Mode
(*2)
Operating Status
Parameter
Write
Switching to
PU Operation
Mode
Operation
mode
Status
PU
During
stop
ON
→ OFF
(*1)
PU
→
External
During stop
Allowed
→
disallowed
Disallowed
During
operation
ON
→ OFF
(*1)
If external
operation
frequency setting
and start signal are
entered, operation
is performed in that
status.
Allowed
→
disallowed
Disallowed
External
During
stop
OFF
→ ON
External
During stop
Disallowed
→
disallowed
Allowed
ON
→ OFF
Disallowed
→
disallowed
Disallowed
During
operation
OFF
→ ON
During operation
→
output stop
Disallowed
→
disallowed
Disallowed
ON
→ OFF
Output stop
→
operation
Disallowed →
disallowed
Disallowed