Fuji Electric FRENIC-MEGA, Инструкция по эксплуатации

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5-105
E65 Reference Loss Detection (Continuous running frequency)
When the analog frequency command (setting through terminal [12], [C1], or [V2]) has dropped below 10% of the reference
frequency within 400 ms, the inverter presumes that the analog frequency command wire has been broken and continues its
operation at the frequency determined by the ratio specified by E65 to the reference frequency.
Refer to E20 through
E24 and E27 (data = 33).
When the frequency command level (in voltage or current) returns to a level higher than that specified by E65, the inverter
presumes that the broken wire has been fixed and continues to run following the frequency command.
In the diagram above, f1 is the level of the analog frequency command sampled at any given time. The sampling is repeated
at regular intervals to continually monitor the wiring connection of the analog frequency command.
- Data setting range: 0 (Decelerate to stop), 20 to 120%, 999 (Disable)
Avoid an abrupt voltage or current change for the analog frequency command. An abrupt change may be
interpreted as a wire break.
Setting E65 data at "999" (Disable) allows the
REF OFF
signal ("Reference loss detected") to be issued, but does
not allow the reference frequency to change (the inverter runs at the analog frequency command as specified).
When E65 = "0" or "999," the reference frequency level at which the broken wire is recognized as fixed is "f1
×
0.2."
When E65 = "100" (%) or higher, the reference frequency level at which the wire is recognized as fixed is "f1
×
1."
The reference loss detection is not affected by the setting of analog input adjustment (filter time constants: C33,
C38, and C43)
E78, E79
E80, E81 Torque Detection 1 (Level and Timer)
Torque Detection 2/Low Torque Detection (Level and Timer)
E78 specifies the operation level and E79 specifies the timer, for the output signal
TD1
. E80 specifies the operation level
and E81 specifies the timer, for the output signal
TD2
or
U-TL
.
Output signal Assigned data
Operation level Timer
Range: 0 to 300% Range: 0.01 to 600.00 s
TD1
46 E78 E79
TD2
47 E80 E81
U-TL
45 E80 E81