Astraada DRV-24 frequency inverters Communication protocol
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Note: the blank in the above command is for illustration. The blank can not be added in the actual
application unless the upper monitor can remove the blank by themselves.
7.6 Common communication fault
Common communication faults: no response to the communication or the inverter returns
abnormal fault.
The possible reason for no response to the communication:
Selecting wrong serial interface, for example, if the converter is COM1, selecting COM2 during the
communication
The baud rate, digital bit, end bit and check bit are not the same with the in and - of RS485
are connected in reverse.
The 485 wire cap on the terminal board of the inverter is not plug in. the wire cap in behind the
terminal arrangement.
Appendix A Technical Data
A.1 Ratings
A.1.1 Capacity
Inverter sizing is based on the rated motor current and power. To achieve the rated motor power
given in the table, the rated current of the inverter must be higher than or equal to the rated motor
current. Also the rated power of the inverter must be higher than or equal to the rated motor power.
The power ratings are the same regardless of the supply voltage within one voltage range.
Note:
1. The maximum allowed motor shaft power is limited to 1.5*PN. If the limit is exceeded, motor
torque and current are automatically restricted. The function protects the input bridge of the drive
against overload.
2. The ratings apply at ambient temperature of 40°C.
3. It is important to check that in common DC systems the power flowing through the common DC
connection does not exceed PN.
A.1.2 Derating
The load capacity decreases if the installation site ambient temperature exceeds 40°C, the altitude
exceeds 1000 meters or the switching frequency is changed from 4 kHz to 8, 12 or 15 kHz.
A.1.2.1 Temperature derating
In the temperature range +40°C…+50°C, the rated output current is decreased by 1% for every
additional 1°C. Refer to the below list for the actual derating.
A.1.2.2 Altitude derating
The device can output rated power if the installation site below 1000m. The output power
Summary of Contents for AS24DRV4075
Page 1: ...Operation Manual Astraada DRV 24 Frequency inverters ...
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