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8.2. Monitoring from the computer
This section explains how to monitor the operating status of the inverter from the computer.
Monitoring of the output frequency from the computer (FD00, FE00)
Output frequency (current status): “Communication Number FD00” (minimum unit: 0.01Hz)
Output frequency (status immediately before the occurrence of a trip): “Communication Number
FE00” (minimum unit: 0.01Hz)
The current output frequency is read out in hexadecimal in units of 0.01Hz. For example, if the out-
put frequency is 80Hz, 1F40H (hexadecimal number) is read out. Since the minimum unit is 0.01Hz,
1F40H (hexadecimal number) = 8000 (decimal number) x 0.01 = 80 (Hz)
Example: Monitoring of the output frequency (operation frequency: 50Hz) ・・・ (1F40H=8000d,
8000×0.1=80Hz)
Computer→Inverter Inverter
→Computer
(RFD00)CR (RFD001F40)CR
The following items are also calculated in the same way.
• FD22 (PID feedback value).................................Unit: 0.01Hz
• FD16 (speed feedback) ......................................Unit: 0.01Hz
• FD29 (input power) .............................................Unit: 0.01kW
• FD30 (output power) ...........................................Unit: 0.01kW
Monitoring of the output current with the computer (FD03, FE03)
Output current (current status): “Communication Number FD03” (minimum unit: 0.01Hz)
Output current (status immediately before the occurrence of a trip): “Communication Number FE03”
(minimum unit: 0.01Hz)
The current output current is read out in hexadecimal in units of 0.01%. For example, if the output
current of an inverter with a current rating of 4.8A is 2.4A (50%), 1388H (hexadecimal number) is
read out. Since the minimum unit is 0.01%, 1388H (hexadecimal number) = 5000 (decimal number)
x 0.01 = 50 (%)
Example: Monitoring of the output current (output current: 90%) ・・・ (2328H=9000d,
9000×0.01=90%)
Computer→Inverter Inverter
→Computer
(FRD03)CR (RFD032328)CR
The following items are also calculated in the same way.
• FD05 (output voltage) .........................................Unit: 0.01% (V)
• FD04 (DC voltage) ..............................................Unit: 0.01% (V)
• FD18 (torque)......................................................Unit: 0.01% (N·m)
*
* If data on the motor connected to the inverter is entered with parameters f405 to f415,
100% of the monitored torque closely agrees with the rated torque of the motor.