10-8
H75: DB resistor ED limit setting
0
No limit
Caution
Take caution when DB resistor is used over its Watt rating. Fire may
result from resistor overheat. When resistor having heat detection sensor
is used, sensor output can be used as external trip signal in multi-
function input.
1 ED is limited as the setting in H 76.
H76: set the resistor operating rate(%ED) in one sequence of operation. Continuous usage
reate is Max 15 sec and usage signal is not issued over 15 sec.
Ex 1)
[%]100
____
_
76 ×
+++
=
stopTdecTsteadyTaccT
decT
H
Where,
T_acc: Acceleration time to reach a setting freq.
T_steady: Time for constant speed operation at setting freq.
T_dec: Time to decelerate to lower freq. than that in constant speed
or time to stop from freq. in constant speed.
T_stop: waiting time at a stop before operation is resumed.
Freq.
T_acc T_steady T_dec T_stop
Ex 2)
[%]100
2__1__
_
76 ×
+++
=
steadyTaccTsteadyTdecT
decT
H
Freq.
T_acc
T_steady1
T_dec
T_steady2
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