Mitsubishi Electric FR-D720S SC EC Instruction Manual page 349

Parameter
6.18.3 Operation selection at communication error occurrence
(Pr. 121, Pr. 122, Pr. 502)
Pr. Initial
Name
No. Value
Number of PU
121
communica- 1
tion retries
PU communi-
122
cation check 9999
time interval
Stop mode
selection at
502
0
communica-
tion error
The above parameters can be set when Pr. 160 = 0.
FR-D700 SC EC
Setting
Description
Range
Number of retries at data receive error occurrence
If the number of consecutive errors exceeds the permissi-
ble value, the inverter will come to trip (depends on
0–10
Pr. 502).
Valid only Mitsubishi inverter (computer link operation)
protocol
If a communication error occurs, the inverter will not
9999
come to trip.
RS485 communication can be made. Note that a commu-
nication fault (E.PUE) occurs as soon as the inverter is
0
switched to the operation mode (network operation mode
in the initial setting) with the control.
Communication check (signal loss detection) time inter-
0.1
valIf a no-communication state persists for longer than
–
the permissible time, the inverter will come to trip
999.8 s
(depends on Pr. 502).
9999 No communication check (signal loss detection)
At fault occur-
Indication
rence
0 Coasts to stop E.PUE
Decelerates to After stop
1
stop E.PUE
Decelerates to After stop
2
stop E.PUE
Communication operation and settings
Parameters referred to
190/192/
At fault
Fault output
removal
Stop
Output
(E.PUE)
Output after Stop
stop (E.PUE)
Automatic
Without
restart
output
functions
Refer to
Section
7 Acceleration time 6.6.1
8 Deceleration time 6.6.1
Output terminal 6.9.5
197 function selection
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