Mitsubishi Electric Freqrol-A100 Instruction Manual page 122

Pr. 152
-
Pr. 155
Timing chart
Start signal OFF ON
Output
current
0 [A1
- ,
Note: If the output current exceeds the preset detection level an.d the
condition not established, the open circuit detection signal is held for
about 100ms.
Pr. 152 "open circuit
detection level"
A
CAUTION.
A
DO not set the open circuit detection level too large and
.
the open circuit detection time too long. If set so, the
detection signal may not be output when the output
current is small and torque is not generated.
/
A
Provide a safety backup, such as an emergency brake,
to prevent the machine and equipment from resulting in
hazardous conditions when the open circuit detection
signal is used.
1
a
Pr. 154 "cumulative power monitor clear"
Pr. 152
:\
.-
- - - -
a
,
I
I
/
0 0 m s e c L
Use this parameter to clear the power added up (accumulated)
during the actual operation period of the inverter.
.
(1 ) Display
Set 25 in Pr. 52 "PU main display data selection" to display the
-
monitor value. This value is added per hour. Note that no
power is added if inverter run is less than one hour.
For the accuracy of this monitor, its error will be maximum at
70% of the rated load.
(2) Clearing method
Set 0 in Pr. 154 "cumulative power monitor clear".
Open circuit detection OFF
(terminal RT) can be selicted.
0 N
Pr.
155 Set
Value
Second Control Function Condition
signal output
I I I I
- -
Detection time Detection time
in Pr. 153 in Pr. 153
0 Immediately activated and deactivated according to the
(factory setting) signal ONlOFF of terminal RT.
Activated only when the signal of terminal RT is ON at
10
constant speed. (The function is not activated during
acceleration/deceleration if the signal of terminal RT is
I
Note: "1" or "1 1" is for exclusive use by the manufacturer and
1
must not be set.