(N) Operation via communication and its settings
15
2
GROUP
N
Communication EEPROM write selection (Pr.342)
• When parameter write is performed via the inverter PU connector, USB communication, the Ethernet connector, or a
communication option, the parameters storage device setting can be switched to RAM only from both EEPROM and RAM.
Use this function if parameter settings are changed frequently.
• When changing the parameter values frequently, set "1" in
Pr.342 Communication EEPROM write selection
to write
them to the RAM only. The life of the EEPROM will be shorter if parameter write is performed frequently with the setting
unchanged from "0 (initial value)" (EEPROM write).
NOTE
• Turning OFF the inverter's power supply clears the modified parameter settings when
Pr.342
= "1" (write to RAM only).
Therefore, the parameter values at next power-ON are the values last stored in EEPROM.
• The parameter setting written in RAM cannot be checked on the operation panel. (The values displayed on the operation
panel are the ones stored in EEPROM.)
Operation selection at a communication error (Pr.502, Pr.779)
• For communication via the Ethernet connector or a communication option, operation at a communication error can be
selected. The operation is active under the Network operation mode.
• The operation at a communication error can be selected with
Pr.502
when
Pr.1431 Ethernet signal loss detection
function selection
= "3" or
Pr.1432 Ethernet communication check time interval
"9999" during Ethernet
communication.
• When a communication error is detected during communication via the Ethernet connector while
Pr.1431 Ethernet signal
loss detection function selection
= "2 or 3", the alarm (LF) signal is output via an output terminal of the inverter. For the
LF signal, set "98 (positive logic) or 198 (negative logic)" in any of
Pr.190 to Pr.196 (Output terminal function selection)
to assign the function to the output terminal. (While communication is performed with a communication option, the LF signal
is output only when "3 or 4" is set in
Pr.502
.)
If in communication by the communication option, the "E.OP1" indication is displayed.
Under position control, the operation is continued to the target position.
When the communication error is removed during deceleration, the motor re-accelerates. Under position control, the motor does not re-
accelerate even when the communication error is removed during deceleration.
Fault record
Pr.502
setting
At fault occurrence
At fault removal
Operation
Indication
Fault (ALM)
signal
Operation
Indication
Fault (ALM)
signal
Communication line
0
(initial
value)
Output shutoff
"E. EHR"
ON
Output stop
status
continues.
ON
1
Output to
decelerate and
stop the motor
"E.EHR" after
stop
ON after stop
2
OFF
Restart
Normal
OFF
3
Operation
continues at the
frequency set in
Pr.779
.
Normal
Normal
4
"CF" warning
Communication option
(when a
communication option
is used)
0, 3
Output shutoff
"E. 1"
ON
Output stop
status
continues.
"E. 1"
ON
1, 2
Output to
decelerate and
stop the motor
"E. 1" after stop ON after stop
4
Operation
continues at the
frequency set in
Pr.779
.
"CF" warning
OFF
Operation
continues at the
frequency set in
Pr.779
.
"CF" warning
OFF
