Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 832 / 1218

(N) Operation via communication and its settings Parameters
5 - 630
I003100E
Fig. 5-314: Operation selection at a communication option fault
NOTES When a communication option is used, the protective function [E.OP1 (fault data: HA1)] is acti-
vated at error occurrences on the communication line. The protective function [E.1 (fault data:
HF1)] is activated at error occurrences in the communication circuit inside the option.
Fault output indicates the Fault signal (ALM) and an alarm bit output.
When the fault output is set enabled, fault records are stored in the faults history. (A fault record is
written to the faults history at a fault output.)
When the fault output is not set enabled, fault record is overwritten to the faults history of the
faults history temporarily but not stored.
After the fault is removed, the fault indication goes back to normal indication on the monitor, and
the faults history goes back to the previous status.
If Pr. 502
≠
"0", the normal deceleration time setting (settings like Pr. 8, Pr. 44, and Pr. 45) is applied
as the deceleration time. Normal acceleration time setting (settings like Pr. 7 and Pr. 44) is applied
as the acceleration time for restart.
When Pr. 502 = "2, 3 or 4", the inverter operates with the start command and the speed command,
which were used before the fault.
Pr.779 = “9999” Pr.779 = “9999”
Pr. 502 setting "4"
Fault occurrence Fault removal
Communication
fault
OFF
OFF
ON
Pr. 779 = "9999"
(Runs at the frequency setting of Pr. 779)
Time
Display
Warning display
(CF)
Fault output
(ALM)
Alarm output
(LF)
OFF
OFF ON
Pr. 779
≠
"9999"
Pr. 779
Pr. 502 setting "0 (initial value) or 3"
Fault occurrence Fault removal
Communication
fault
O
utput fr
equenc
y
OFF
OFF ON
ON OFF
Time
Motor coasting
Fault display
(E.1)
Fault output
(ALM)
Display
Alarm output
(LF)
OFF
Pr. 502 setting "1 or 2"
OFF OFF ON
ON
OFF
Time
Decelerates to stop
Fault occurrence Fault removal
Communication
fault
Fault display
(E.1)
Fault output
(ALM)
O
utput fr
equenc
y
Display
Alarm output
(LF)
OFF