Restrictions - Omron RX Series User Manual

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Restrictions

Restriction on Light Load Mode
Selecting the light load mode disables the following controls.
• 0-Hz sensorless vector control
• Sensor vector control
Therefore, functions associated with these controls such as position and torque control functions are
unavailable.
In addition, switching from the heavy load mode to the light load mode causes the rated current and
overload detection level of the inverter to be changed, which also changes the default data and setting
ranges of some parameters accordingly.
Check the ambient environment; the operating ambient temperature for the light mode is –10 to 40°C.
Limitation on 0-Hz Sensorless Vector Control
When 0-Hz sensorless vector control is used, a large current flows at low frequencies. To protect the
inverter against overload, select and use an inverter whose rated capacity is one size larger than the
rated capacity of the motor.
Limitation on RS485 Communications
When the inverter is used with any of the following communications units, the inverter's RS485
communications function cannot be used due to conflict in command system information. Control the
inverter from the host of each communications unit.
• EtherCAT Communications Unit (Model: 3G3AX-RX-ECT)
• CompoNet Communications Unit (Model: 3G3AX-RX-CRT-E)
• DeviceNet Communications Unit (Model: 3G3AX-RX-DRT-E)
Limitation on Built-in EMC Filter
If the EMC filter that is built into this inverter is used, a stand-alone inverter complies with the EMC
directives (EN61800-3 Category C3) required by CE standards.
However, if any of the following communications units is used, the optional EMC Noise Filter (upcoming
product) is required.
• EtherCAT Communications Unit (Model: 3G3AX-RX-ECT)
• CompoNet Communications Unit (Model: 3G3AX-RX-CRT-E)
• DeviceNet Communications Unit (Model: 3G3AX-RX-DRT-E)
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
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