Mitsubishi Electronics FR-F700-NA ユーザーズマニュアル

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Communication operation and setting
4.19.4 Communication EEPROM write selection (Pr. 342)
⋅ When changing the parameter values frequently, set "1" in Pr. 342 to write them to the RAM. The life of the EEPROM
will be shorter if parameter write is performed frequently with the setting unchanged from "0 (initial value)" (EEPROM
write).
4.19.5 Operation selection at communication error (Pr.502, Pr.779)
When parameter write is performed from PU connector, RS-485 terminal, and communication option connected
to the inverter, parameter’s storage device can be changed from EEPROM + RAM to only RAM. Set this
parameter when frequent parameter changes are required.
Parameter 
Number
Name
Initial Value
Setting 
Range
Description
342
Communication EEPROM write 
selection
0
0
Parameter values written by communication
are written to the EEPROM and RAM.
1
Parameter values written by communication
are written to the RAM.
The above parameters can be set when Pr. 160 User group read selection = "0". 
However, it can be set any time when the communication 
option is connected. (Refer to page 190)
REMARKS
⋅ When Pr. 342 is set to "1" (only RAM write), the new values of the parameters will be cleared at power supply-OFF of the inverter.
Therefore, the parameter values available when power is switched ON again are the values stored in EEPROM previously.
For communication using RS-485 terminals or a communication option, operation at a communication error can
be selected. The operation is active under the Network operation mode. 
Parameter
number 
Name
Initial 
value
Setting 
range
Description
502
Stop mode selection at 
communication error
0
At error 
occurrence
Indication
Fault 
output
At error 
removal
0
Coasts to 
stop
E.SER*
Output
Stops
(E.SER)*
1
Decelerates 
to stop
 E.SER after 
stop*
Output after 
stop
Stops
(E.SER)*
2
Decelerates 
to stop
E.SER after 
stop*
Without 
output 
Restarts
3
Continues 
running at 
Pr. 779
Without 
output 
Operates 
normally
779
Operation frequency 
during communication 
error
9999
0 to 400Hz
Motor runs at the specified frequency at a communication 
error.
9999
Motor runs at the frequency used before the 
communication error.
* E.OP1 or E.OP2 appears when using a communication option.
The above parameters can be set when Pr. 160 User group read selection = "0." (Refer to page 190.)
...... The specification differs according to the manufacture dateRefer to page 400 and check the SERIAL.