Output Current Detection Function (Y12 Signal, Y13 Signal, Pr. 150 To Pr. 153) - Mitsubishi Electric 700 Series Instruction Manual

5.11.6 Output current detection function (Y12 signal, Y13 signal, Pr. 150 to Pr. 153)

The output current is detected while the inverter is running, and the signals are output through FL remote
communication.
Parameter
Name
Number
Output current detection
150
level
Output current detection
151
signal delay time
Zero current detection
152
level
Zero current detection
153
time
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 167)
Pr. 150
Pr. 151
Output current
OFF
detection signal
(Y12)
Pr. 152
Pr. 152
0[A]
OFF ON
Start signal
Zero current
OFF
detection time
(Y13)
Pr. 153
Detection time
∗ The zero current detection signal (Y13) holds the
signal for approximately 100ms once turned ON.
REMARKS
This function is also valid during execution of the offline auto tuning.
The response time of Y12 and Y13 signals is approximately 0.1s. Note that the response time changes according to the load
condition.
When Pr. 152 = "0", detection is disabled.
The zero current detection level setting should not be too low, and the zero current detection time setting not too
long. Otherwise, the detection signal may not be output when torque is not generated at a low output current.
To prevent the machine and equipment from resulting in hazardous conditions detection signal, install a
safety backup such as an emergency brake even the zero current detection function is set valid.
Parameters referred to
Offline auto tuning
Initial Value
150%
0s
5%
0.5s
Time
100ms
OFF
ON
100ms* Time
OFF
ON ON
Pr. 153
Detection time
CAUTION
Refer to page 127
Setting
Range
0 to 200% 100% is the rated inverter current.
Output current detection period.
The time from when the output current has risen
0 to 10s
above the setting until the output current detection
signal (Y12) is output.
0 to 200% The rated inverter current is assumed to be 100%.
Period from when the output current drops below the
0 to 1s Pr. 152 value until the zero current detection signal
(Y13) is output.
(1) Output current detection
(Y12 signal, Pr. 150, Pr. 151)
The output current detection function can be used for
excessive torque detection, etc.
If the output current remains higher than the Pr.150 setting for
longer than the time period set in Pr.151 in the inverter
operation using FL remote communication, the output
current detection signal (Y12) is output.
When the Y12 signal turns ON, the ON state is held for
approximately 100ms.
(2) Zero current detection (Y13 signal, Pr. 152, Pr. 153)
If the output current remains lower than the Pr.152 setting for
longer than the time period set in Pr.153 in the inverter
operation using FL remote communication, the zero current
detection signal (Y13) is output.
When the inverter's output current falls to "0", torque will not
be generated. This may cause a drop due to gravity when
the inverter is used in vertical lift application.
To prevent this, the Y13 signal can be output from the
inverter to close the mechanical brake when the output
current has fallen to "zero".
I/O signal control
Description
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