Communication Eeprom Write Selection (Pr. 342); Operation Selection At Communication Error (Pr.502, Pr.779) - Mitsubishi F700 Series Instruction Manual

4.19.4 Communication EEPROM write selection (Pr. 342)

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
Name
Number
Communication EEPROM write
342
selection
The above parameters can be set when Pr. 160 User group read selection = "0".
option is connected.
(Refer to page 185)
 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).
REMARKS
 When Pr. 342
is set to "1" (only RAM write)
Therefore, the parameter values available when power is switched ON again are the values stored in EEPROM previously.

4.19.5 Operation selection at communication error (Pr.502, Pr.779)

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
Name
number
Stop mode selection at
502
communication error
Operation frequency
779 during 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 185.)
Setting
Initial Value
Range
0
0
1
However, it can be set any time when the communication
, the new values of the parameters will be cleared at power supply-OFF of the inverter.
Initial Setting
value range
At error
occurrence
Coasts to
0
Decelerates
1
0 to stop
Decelerates
2
to stop
Continues
3 running at
Pr. 779
Motor runs at the specified frequency at a communication
0 to 400Hz
error.
9999
Motor runs at the frequency used before the
9999
communication error.
Communication operation and setting
Description
Parameter values written by communication
are written to the EEPROM and RAM.
Parameter values written by communication
are written to the RAM.
Description
Fault
Indication
output
E.SER* Output
stop
E.SER after Output after
stop* stop
E.SER after Without
stop* output
Without

output
At error
removal
Stops
(E.SER)*
Stops
(E.SER)*
Restarts
Operates
normally
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