4－59

459

PID Loop Configuration

The inverter’s PID loop algorithm is configurable for various applications.

PID Output Limit - The PID loop controller has a built-in output limit function. This function monitors the difference between the PID setpoint and the loop output (inverter output frequency), measured as a percentage of the full scale range of each. The limit is specified by parameter A078.

ξWhen the difference (Setpoint – loop output) is smaller than or equal to the A078 limit value, the loop controller operates in its normal linear range.

ξWhen the difference (Setpoint – loop output) is larger than the A078 limit value, the loop controller changes the output frequency as needed so that the difference does not exceed the limit.

The diagram below shows PID setpoint changes and the related output frequency behavior when a limit value in A078 exists.

 

 

Limit imposed

%

 

on output

 

 

Output limit

 

 

 

A078

 

PID Setpoint

 

 

Output freq.

A078

 

Output limit

Limit imposed

 

 

on output

 

 

 

 

t

Error Inversion - In typical heating loops or ventilation loops, an increase in energy into the process results in an increasing PV. In this case, the Loop Error = (SP – PV). For cooling loops, an increase in energy into the process results in a decreasing PV. In this case, the Loop Error = –(SP – PV). Use A077 to configure the error term.

 

 

 

A077

 

=00

 

 

 

 

 

 

 

 

A077

 

=01

 

 

 

 

SP

+

 

 

 

Error

 

Freq.

SP

-

 

 

 

Error

 

Freq.

 

6

PID

 

6

PID

 

 

 

 

 

 

 

 

calculation

 

 

 

 

 

 

 

 

 

 

 

 

calculation

 

 

 

 

-

 

PV from process with

 

+

PV from process with

 

 

PV

 

 

 

PV

 

 

 

 

 

 

 

positive correlation

 

 

 

 

 

 

 

 

 

 

negative correlation

 

 

Other PID-related topics:

ξ“PID Control” on page 3–22

ξ“PID ON/OFF and PID Clear” on page 4–26

ξ“Output Deviation for PID Control” on page 4–43

ξ“PID Second Stage Output” on page 4–47

 

and

Inverter

 

installation

Mounting

 

Monitoring

Operationsand

 

 

 

 

 

 

Page 207 Page 209
Page 208
Image 208
Hitachi CP-X200 instruction manual 59, PID Loop Configuration, Other PID-related topics
Page 207 Page 209

CP-X200 specifications

The Hitachi CP-X200 is a versatile and robust projector designed to cater to the needs of educational and business environments. It combines affordability with high-quality performance, making it an attractive option for various presentations and multimedia applications.

At the heart of the CP-X200 is its high brightness capability, with a lumen output of 3,000 ANSI lumens. This feature enables the projector to deliver clear and vibrant images even in well-lit rooms. The resolution of XGA (1024 x 768 pixels) ensures that text and graphics are sharp, making it suitable for everything from classroom lectures to corporate presentations.

One of the standout characteristics of the Hitachi CP-X200 is its advanced lamp technology. The projector uses a long-lasting lamp that can provide up to 5,000 hours of usage in standard mode, allowing for extended intervals between lamp replacements. Additionally, the ECO mode can further enhance the lamp life, extending its longevity while reducing energy consumption.

The CP-X200 is equipped with a variety of connectivity options, including HDMI, VGA, and composite inputs, allowing users to easily connect it to various devices such as laptops, DVD players, and other multimedia systems. The inclusion of USB and RS-232 interfaces ensures compatibility with different control systems, making it a flexible choice for diverse setups.

Another significant feature is the projector's built-in 10-watt speaker, which provides decent audio output, eliminating the need for external speakers in smaller venues. The speaker system enhances presentations, ensuring that audio and visuals are cohesive, promoting better audience engagement.

Portability is another key aspect of the Hitachi CP-X200, which weighs just around 3.5 kg (approximately 7.7 lbs), allowing for easy transport between locations. Its compact design makes it suitable for both fixed installations and mobile use, catering to professionals who require a projector that adapts to various environments.

The user-friendly interface and robust remote control enhance the projector's operability, providing easy access to essential functions. Additionally, features such as auto keystone correction adjust the image to maintain consistent quality even when the projector is not perfectly aligned with the screen.

In summary, the Hitachi CP-X200 is a feature-rich projector that embodies reliability, performance, and ease of use. Its combination of high brightness, various connectivity options, long lamp life, portability, and integrated audio makes it an excellent choice for education and business professionals seeking a dependable presentation solution.
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