Mitsubishi Electric 800 Series Manual page 122

7
Load characteristics fault detection
This section describes how to set the load characteristics reference for the existing load characteristics fault detection
function. The following shows the procedure to set the load characteristics reference manually.
Pr. Name
1481
Load characteristics load reference 1
H521
1482
Load characteristics load reference 2
H522
1483
Load characteristics load reference 3
H523
1484
Load characteristics load reference 4
H524
1485
Load characteristics load reference 5
H525
 Setting the load characteristics reference manually (Pr.1481 to
Pr.1485)
• Set Pr.1480 Load characteristics measurement mode = "0" (initial value).
• Set Pr.1486 and Pr.1487 to specify the frequency band for the measurement, and calculate the frequency as the load
characteristics reference (f2 to f4) using the following table.
• Start the inverter operation, and set Pr.1481 = "8888" during operation at the frequency of the load characteristics reference 1
(f1). The load status at that point is set in Pr.1481 (only when the set frequency is within ±2 Hz of the frequency of the
measurement point, and the SU signal is ON).
• Set load references in Pr.1482 to Pr.1485 in the same way as Pr.1481.
Reference
Load characteristics reference 1
Load characteristics reference 2
Load characteristics reference 3
Load characteristics reference 4
Load characteristics reference 5
NOTE
• When inputting values directly in Pr.1481 to Pr.1485 under V/F control or Advanced magnetic flux vector control,
input the load meter monitored values at the frequency of each load characteristics reference.
• When inputting values directly in Pr.1481 to Pr.1485 under Real sensorless vector control, Vector control, or PM
sensorless vector control, input the load meter monitored values at the frequency of each load characteristics
reference.
8
PLC function
This section describes the CC-Link I/O specifications for the PLC function. For details, refer to the PLC function
programming manual.
• The signal name of the PLC function device No. Y34 differs depending on the setting of Pr.192 IPF terminal function selection
as follows.
Pr.192 setting
9999
Other than 9999
• The signal name of the PLC function device No. Y35 differs depending on the setting of Pr.193 OL terminal function selection
as follows.
Pr.193 setting
9999
Other than 9999
Initial
value
9999
9999
9999
9999
9999
Frequency
f1: Load characteristics minimum frequency (Pr.1487)
f2 = (f5-f1)/4+f1
f3 = (f5-f1)/2+f1
f4 = (f5-f1)×3/4+f1
f5: Load characteristics maximum frequency (Pr.1486)
Signal name
Instantaneous power failure (Terminal IPF function)
Overload alarm (Terminal OL function)
Signal name
Overload alarm (Terminal OL function)
Instantaneous power failure (Terminal IPF function)
Setting
range
Set the reference value of normal load characteristics.
0 to 400% 8888: The present load status is written as reference status.
9999: The load reference is invalid.
Pr.1481
Pr.1482
Pr.1483
Pr.1484
Pr.1485
9
Description
Load reference
BCN-C22005-906