Selection of operation mode and operation location
Parameter
6 - 180
PU operation interlock (Pr. 79 = 7)
The PU operation interlock function is designed to forcibly change the operation mode to ex-
ternal operation mode when the PU operation interlock signal (X12) input turns 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.
Set "7" (PU operation interlock) in Pr. 79. For the terminal used for X12 signal (PU operation in-
terlock signal) input, set "12" to any of Pr. 178 to Pr. 182 to assign the function. (Refer to section
6.9.1) When the X12 signal has not been assigned, the function of the MRS signal switches from
MRS (output stop) to the PU operation interlock signal.
Function/operation changed by switching on-off the X12 (MRS) signal
The operation mode switches to external operation mode independently of whether the start
signal (STF, STR) is on or off. Therefore, the motor is run in external operation mode when
the X12 (MRS) signal is turned off with either of STF and STR on.
At alarm occurrence, pressing the STOP/RESET key of the operation panel resets the
inverter.
X12 (MRS) Signal
Function/Operation
Operation Mode
Parameter write
ON
Operation mode (external, PU, NET)
switching enabled
Output stop during external operation
Parameter write enabled (depending on Pr. 77
"Parameter write selection" and each parame-
ter write condition
(Refer to Tab. 6-1 for the parameter list.)
OFF
Forcibly switched to external operation mode
Switching to PU or NET operation mode disa-
bled
Parameter write disabled with exception of
Pr. 79
Tab. 6-37:
Function of the X12 signal
Operation Condition
X12 (MRS)
Signal
Operation
Mode
Operating Status
Switching to PU,
NET Operation
Mode
Operation
mode
Status
PU/NET
During stop ON
→
OFF
External
If external operation frequency set-
ting and start signal are entered,
operation is performed in that status.
Disallowed
Running
ON
→
OFF
Disallowed
External
During stop
OFF
→
ON
External
Stop
Enabled
ON
→
OFF
Disallowed
Running
OFF
→
ON
During operation
→
output stop
Disallowed
ON
→
OFF
Output stop
→
During operation
Disallowed
Tab. 6-38:
Switching the X12 (MRS) signal
NOTES
If the X12 (MRS) signal is on, the operation mode cannot be switched to PU operation mode
when the start signal (STF, STR) is on.
When the MRS signal is used as the PU interlock signal, the MRS signal serves as the nor-
mal MRS function (output stop) by turning on the MRS signal and then changing the Pr. 79
value to other than "7" in the PU operation mode. Also as soon as "7" is set in Pr. 79, the sig-
nal acts as the PU interlock signal.
When the MRS signal is used as the PU operation interlock signal, the logic of the signal is
as set in Pr. 17. When Pr. 17 = 2, read ON as OFF and OFF as ON in the above explanation.
Changing the terminal assignment using Pr. 178 to Pr. 182 may affect the other functions.
Please make setting after confirming the function of each terminal.
Содержание FR-D720S SC EC
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Страница 24: ...Description of the case Product checking and part identification 1 4 ...
Страница 108: ...Operation panel Operation 4 20 ...
Страница 436: ...Setting for the parameter unit and operation panel Parameter 6 286 ...
Страница 484: ...Measurements on the main circuit Maintenance and inspection 8 14 ...
Страница 504: ...Specification change Appendix A 20 ...
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Страница 510: ...Index Appendix A 24 ...
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