Communication E²Prom Write Selection (Pr. 342); Operation Selection At Communication Error (Pr. 502, Pr. 779) - Mitsubishi Electric FR-F740 EC Instruction Manual

Communication operation and setting
6.18.4 Communication E²PROM write selection (Pr. 342)
Parameters written via the inverter's PU connector, RS485 terminals, or from the communica-
tion option can be written to the RAM. Set this parameter when frequent parameter changes are
required.
When changing the parameter values frequently, set "1" in Pr. 342 to write them to the RAM. The
life of the E²PROM will be shorter if parameter write is performed frequently with the setting un-
changed from "0" (initial value) (E²PROM write).
Pr.
Name
No.
Communication
342
E²PROM write selection
The above parameter can be set when Pr. 160 = 0. However, the parameter can be set whe-
never the communication option is connected. (Refer to section 6.16.4.)
NOTE 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 E²PROM previously.
6.18.5

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

For communication using RS485 terminals or a communication option, operation at a commu-
nication error can be selected. The operation is active under the Network operation mode.
Pr.
Name
No.
Stop mode selec-
502
tion at communi-
cation error
Operation fre-
quency during
779
communication
error
* E.OP1 or E.OP2 appears when using a communication option.
The above parameters can be set when Pr. 160 = 0.
6 - 264
Initial Setting
Description
Value Range
Parameter values written by communica-
0
tion are written to the E²PROM and RAM.
0
Parameter values written by communica-
1
tion are written to the RAM.
Initial Setting
Description
Value Range
At fault
occurrence
Coasts to
0
stop
Decelerates
1
to stop
0
Decelerates
2
to stop
Continues
3 running at
Pr. 779
Motor runs at the specified frequency at a communica-
0–
400Hz
tion error.
9999
Motor runs at the frequency used before the communi-
9999
cation error.
At fault
Indication Fault output
removal
Stop
E.SER Output
(E.SER)
After stop Output after Stop
E.SER* stop (E.SER)
Automatic
After stop Without
restart
E.SER * output
functions
Without Operates
—
output normally
Parameter
Parameters referred to
—
Parameters referred to Refer to
7 Acceleration
time
8 Deceleration
time
335 RS485 com-
munication
retry count
336 RS485 com-
munication
check time
interval
539 Modbus-RTU
communica-
tion check
time interval
550 NET mode
operation
command
source selec-
tion
551 PU mode ope-
ration com-
mand source
selection
Refer to
Section
Section
6.6.1
6.6.1
6.18.3
6.18.3
6.18.7
6.17.3
6.17.3