E6581315

•If the “Frequency point selection” function is disabled (=)

The operation frequency (frequency command value) of the inverters are calculated using the fol- lowing equations, with the received data in the following equation used as the data received from the master inverter when inverters are operated under the control of a master inverter (inter-drive communication), or with the received data in the following equation used as the data received from the computer when inverters are operated under the control of a computer (computer-linked opera- tion).

fc( Hz ) =

Slave recieve data(%)⋅ Slave side FH

 

 

(Hz)

 

 

 

 

 

 

 

 

 

 

10000

 

 

 

 

 

 

Example:

 

 

 

 

 

Unit:1=0.01Hz

 

 

 

 

 

Maximum frequency

Operation frequency command value

 

Master (Fc)

 

 

100.00Hz (10000)

 

 

50.00Hz (5000)

 

Slave 1

 

 

90.00Hz (9000)

 

 

45.00Hz (4500)

 

Slave 2

 

 

80.00Hz (8000)

 

 

40.00Hz (4000)

Master send data：fc(%) =

Master side fc ⋅ 10000

=

5000×10000

= 5000 = 50%

Master side FH

10000

 

 

 

 

 

 

 

 

Slave1 : fc( Hz ) =

5000 ⋅ 9000

= 4500 = 45Hz

 

 

 

10000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Slave 2 : fc( Hz ) =

 

5000 ⋅ 8000

= 4000 = 40Hz

 

 

 

10000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

•If the “Frequency point selection” function is enabled (≠)

When inverters are operated under the control of a mater inverter, the operation frequency (fre- quency command value) of the slave inverters are calculated using the following equations.

When inverters are operated under the control of a computer, read “command from the master inverter” in the following equations as “command from the computer.”

fc( Hz ) =

 

Po int 2 frequency − Po int1 frequency

⋅（Master command(%) − Po int1）＋Po int1 frequency

 

 

 

 

 

 

 

 

 

 

 

 

Po int 2 − Po int1

 

 

 

 

 

 

 

 

 

 

 

 

 

(Hz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Example:

Units: Frequency unit 1 = 0.01Hz, Point setting unit 1 = 0.01%

 

 

 

 

 

Maximum

Point 1

 

Point 1 fre-

 

Point 2 set-

 

Point 2

Frequency

 

 

 

 

 

 

frequency

setting

 

quency

 

ting

 

frequency

(Fc)

 

 

 

 

 

 

()

()

 

()

 

()

 

()

 

 

 

Master (Fc)

100.00Hz

－

 

－

 

－

 

－

50.00Hz

 

 

 

 

 

 

(10000)

 

 

 

 

 

 

 

 

 

 

 

 

 

(5000)

 

 

Slave 1

100.00Hz

0.00%

 

0.00Hz

 

100.00%

 

90.00Hz

45.00Hz

 

 

 

 

 

 

(10000)

 

(0)

 

(0)

 

 

 

(10000)

 

(9000)

(4500)

 

 

Slave 2

100.00Hz(1

0.00%

 

0.0Hz

 

100.00%(10

 

80.00Hz

40.00Hz

 

 

 

 

 

 

0000)

 

(0)

 

(0)

 

 

 

000)

 

(8000)

(4000)

 

Data sent by the master inverter

 

 

 

 

 

 

 

 

 

 

 

 

Master send data : fc(%) =

Master side fc ⋅10000

=

5000×10000

= 5000 = 50%

 

 

 

 

 

10000

 

 

 

 

 

 

 

 

 

 

Master side FH

 

 

 

 

 

Both slaves 1 and 2: Result of a conversion made on the slave side

 

 

 

 

fc( Hz ) =

Slave receive data(%) ⋅ Slave side FH

=

5000 ⋅10000

= 5000 = 50Hz

 

 

 

 

 

 

 

 

 

 

 

 

 

10000

 

 

 

 

 

 

10000

 

 

 

 

 

Both slaves 1 and 2: Result of a conversion to % made prior to a conversion to point frequency

fc(%) =

fc( Hz ) ⋅10000

=

5000 ⋅10000

= 5000 = 50%

 

 

 

 

 

 

10000

 

 

 

 

 

 

 

 

 

Slave side FH

 

 

 

 

 

 

 

 

 

 

 

 

 

Results of conversions to point frequency (for the equation used, see above.)

Slave1 : fc( Hz ) =

 

9000 − 0

 

⋅ ( 5000 − 0 )＋0 = 4500 = 45Hz

10000 − 0

 

 

Slave 2 : fc( Hz ) =

 

8000 − 0

⋅ ( 5000 − 0 )＋0 = 4000 = 40Hz

10000 − 0

 

 

38

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Toshiba VF-AS1 Series, RS485 instruction manual Slave 100.00Hz 00%, 90.00Hz 45.00Hz, Slave 100.00Hz1 00%, 80.00Hz 40.00Hz
Page 38 Page 40

RS485, VF-AS1 Series specifications

The Toshiba VF-AS1 Series represents a significant advancement in the realm of variable frequency drives (VFDs), designed for various industrial applications that demand precision, efficiency, and reliability. With support for RS485 communication, the VF-AS1 Series fosters seamless integration into complex automation systems, making it the perfect choice for modern manufacturing environments.

One of the standout features of the Toshiba VF-AS1 Series is its versatile communication capabilities. The built-in RS485 port allows for easy connectivity with a range of devices, including PLCs (Programmable Logic Controllers) and HMIs (Human-Machine Interfaces). This ensures real-time monitoring and control of motor functions, enhancing operational efficiency and data analysis.

The VF-AS1 Series is engineered with advanced control technologies that provide exceptional motor performance. It incorporates vector control algorithms that optimize torque and speed regulation for both standard and permanent magnet motors. This results in precise motor control across a wide range of speeds and load conditions, ensuring optimum performance and energy savings.

Another noteworthy characteristic is its user-friendly interface. The VF-AS1 features a clear LCD display that allows for easy navigation and configuration. This intuitive design minimizes the learning curve for operators and technicians, facilitating quick setup and adjustments. Additionally, the series supports various programming options, catering to both novice users and experienced professionals.

Energy efficiency is a key priority in the design of the VF-AS1 Series. The drives are equipped with energy-saving features that help reduce overall power consumption and operational costs. With built-in sleep modes and dynamic energy feedback, these drives optimize energy usage based on demand, making them suitable for both constant and variable load applications.

In terms of safety and protection, the VF-AS1 Series incorporates various built-in safeguards, including overvoltage, undervoltage, and overcurrent protection. This comprehensive approach to safety not only protects the drive itself but also ensures the longevity of connected equipment.

Overall, the Toshiba VF-AS1 Series, with its robust feature set, advanced technologies, and focus on energy efficiency, proves to be a reliable choice for a wide range of industrial applications. Its integration of RS485 communication allows for enhanced connectivity and control, making it an excellent solution for modern automation needs.
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