8. Error Detection Processing

8 . 2 T r e a t m e n t f o r a S u d d e n C h a n g e o f T e m p e r a t u r e C o n v e r s i o n D a t a

When the temperature conversion data is changed suddenly due to the disconnection of external wiring or influence of noise, the system judges it to be an abnormal condition.

In the example shown below, every scanned data is read in. If a change of 5ºC(Note) or more from the previously read data is found, the condition is judged to be abnormal and data is aborted.

Note: Change each value to your system.

E x a m p l e o f p r o g r a m

1)

R7E3

2)

3)

4)WR0008

<

H00CC

WR0009

<

H00CC

WR000A

<

H00CC

WR000B

<

H00CC

5)

DR000 == DX000

DR002 == DX002

DR008 == DR000

DR00A == DR002

WR0008 == WR0008 - WR0000 ABS (WR0008 , WR0008) WR0009 == WR0009 - WR0001 ABS (WR0009 , WR0009) WR000A == WR000A - WR0002 ABS (WR000A , WR000A) WR000B == WR000B - WR0003 ABS (WR000B , WR000B)

WR0010 == WR0000

WR0011 == WR0001

WR0012 == WR0002

WR0013 == WR0003

DR0008 == DR0010

DR000A == DR0012

Every scanned data is read in and the data is stored in DR0 and DR2.

For only the initial scanned data, put the read into the previous data(DR8 to DRA).

The absolute value of the difference between the previous data and read data is calculated.

If the difference between the previous data and read data is less than 5ºC, put the read data into WR10 to WR13. In the following program, the values of WR10 to WR13 are treaded a s normal value.

Updates the previous data.

When an error occurred, the data is not updated and instead the previous data is held.

In the example of this program, no protective action or warning against abnormal data is performed. Make additional circuits depending on the situation.

8-2

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Hitachi EH-150 manual Error Detection Processing, A m p l e o f p r o g r a m
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EH-150 specifications

The Hitachi EH-150 is a robust and versatile hydraulic excavator, designed to meet the demands of various construction and mining environments. Known for its reliability and advanced technology, the EH-150 is a favorite among contractors looking for efficiency and performance.

One of the standout features of the Hitachi EH-150 is its powerful engine. It is equipped with a fuel-efficient diesel engine that provides ample horsepower for heavy-duty tasks while maintaining lower emissions. This not only ensures compliance with environmental regulations but also contributes to reduced operating costs over time.

The hydraulic system of the EH-150 is engineered for optimal performance. It utilizes advanced hydraulic technologies that allow for precise control and enhanced responsiveness. The system is designed to minimize energy loss, ensuring that more power generated by the engine is converted into effective digging and lifting capabilities. This feature significantly improves productivity on-site.

The excavator boasts a spacious and comfortable cab that enhances operator ergonomics. It includes adjustable seating, air conditioning, and large windows that provide excellent visibility, enabling operators to work efficiently and safely. The user-friendly controls are intuitively laid out, allowing for easy operation and reducing downtime caused by operator fatigue.

Another notable technology integrated into the Hitachi EH-150 is the machine's monitoring system. This system provides real-time data on performance metrics, fuel consumption, and maintenance needs, helping operators and managers to make informed decisions about the machine's operation. This feature not only aids in maximizing productivity but also in extending the lifespan of the equipment.

Durability is another key characteristic of the EH-150. The excavator features a sturdy track and a reinforced frame, designed to withstand the rigors of demanding jobsites. Its heavy-duty undercarriage provides stability and support, allowing it to operate effectively on uneven terrain.

In summary, the Hitachi EH-150 hydraulic excavator is a powerful, efficient, and technologically advanced machine. With its robust engine, precise hydraulic system, comfortable operator environment, and real-time monitoring capabilities, the EH-150 stands out as an exceptional choice for those in need of reliable and high-performance excavation solutions. Its durability and user-friendly features further make it a preferred option in the competitive construction and mining industries.
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