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I-o Data Cameras

  1. I-o Data Cameras Definition
  2. I-o Data Cameras App

Home > Products > Network Attached Storage, HDL-CEW series

Hard disk supporting LAN & USB connection

The Cognex family of digital industrial cameras are designed for easy integration with Cognex vision software. These small, lightweight cameras in signature Cognex black and yellow show that you have the leading machine vision technology integrated into your system. (3) For I/O ports, the parameter IOZ includes the input leakage current. (4) This is the increase in supply current for each input that is at the specified TTL voltage level, rather than V CC or GND. (5) Measured by the voltage drop between the A and B terminals at the indicated current through the switch. Data acquisition and control products for USB, USB-104, USBP, PICO-IO, USB-PICO, PC/104, PCI, PCI-X, PCIe, PCI Express, PCI-104, PC104+, LPCI, Low Profile PCI, Ethernet and ISA, as well as distributed and wireless I/O. Encompassing Analog and Digital I/O, RS-232, RS-422, and RS-485 serial communication, isolated boards and solutions including integration.

  • Features,Specifications


Features

LAN DISK HDL-CEW Series is a LAN connection hard disk that supports access from personal computers as well as from smartphones.

It supports remote access from iPhone, iPad, and Android terminals. You can access and enjoy various files such as movies, music, photos, and document files, saved in NAS at home, through smartphones or personal computers when you are outside.

Moreover, a “high speed read mode” that achieves a read speed exceeding 50MB/s is built-in, enabling easy data transfer.

You Can Connect From Your Smartphone

Not only does it support access from personal computers, it also supports access from smartphones.

You can easily access and enjoy files saved in LAN DISK, using your smartphone, while at home or outside.

Access using the dedicated application “Remote Link 2”

Easily accessed using the application “Remote Link 2” that supports iPhone/iPad/iPod touch and Android.
You can download it for free from iTunes or Android Market.

⇒ iPhone/iPad/iPod touch version - Download from iTunes
⇒ Android version - Download from Android Market

<Primary Features of Remote Link 2>

  • Access through the Internet when outside, or access LAN DISK through home networks
  • View and download movies, pictures, music, office files (Word, Excel, PowerPoint)
  • Upload movies and picture files taken with smartphone to LAN DISK
  • Slide show feature for pictures

<Application instructions (the pictures are of the android version)>

1) Select the harddisk to be connected.

2) View files in the harddisk.

3) You can enjoy various files. (when the screen is Android.)

<Convenient way of using.>

Listen to any song you want anywhere.You can send important photos and/or cartoons to your home so as to lighten the Smartphone.Access data anywhere to give a presentation

You Can Access From Your Computer Even When Outside

Using netbooks and laptops, you can connect to the hard disk through the Internet when you are outside, such as at a hotel, coffee shop, company, or school.

<Direction>

Easy Access. Just access the http://rm2.iobb.net/ browser.
※User name/ Password/ Host name, and JAVA environment(automatic install) are required.

  • Data transmission is encrypted, which protects your privacy.
  • File operation, upload, and download are supported.

Easy Access! High Speed Read Mode Is Built-in

A high speed read mode is built-in that achieves access at high speed, by optimizing file systems inside LAN DISK. Even for a large amount of data, transfer stress is small and you can use it with ease.
※You can use it only when it is in the LAN connection mode. When it is changed to this mode, you cannot connect with USB.

Measurement
Environment

[PC] DELL Studio 540 (Mark.08)
[OS] Windows XP Professional Service Pack 3 (32 bit)
[CPU] Intel Core 2 Quad CPU Q8200 2.34 GHz
[MEMORY] 4.0 GB
[NIC］Intel 82574L Gigabit Ethernet (PCI Express x1connection)
[System HDD] SeaGate ST3320613AS SD23

CrystalDiskMark3.0.1a
Measurement
Method
Measure the time taken when a file copy 1 GB in size is started until completion.
Using CrystalDiskMark3.0.1a, measure Read values twice.
Calculate the mean value from these 2 measurements.

“LAN ＆ USB Hybrid” That You Can Connect Even With USB

Not only does it support connections with LAN, it also supports connections with USB 2.0.
You can connect to computers that are not connected to LAN.
Moreover, USB 2.0 can copy data at high speed, making it convenient when saving a large amount of data at high speed.
※You cannot change the format type.
※This feature can only be used with Windows.
※When you are using models with a capacity of 3.0 TB or more, you cannot use this feature in Windows XP.

With an Extension USB Port, Backups Can Be Created on an Externally Attached Hard Disk

You can create backups of all the files saved in LAN DISK on externally attached USB hard disks. Furthermore, since it is provided with a scheduled backup feature, you can set it such that it automatically creates backups, regularly.

Furthermore, a “Quick Copy” feature is also built-in, which can directly save data from a USB memory or digital camera connected to USB port in LAN DISK.
※Note that you cannot simultaneously use scheduled backup and Quick Copy.

Specifications

LAN InterfaceTransfer standard: 1000BASE-T/100BASE-TX/10BASE-T
Connector: RJ-45
USB InterfaceTransfer standard: USB2.0/1.1
Connector: USB A connector×1 port, USB mini B connector×1 port
Format When Shipping NTFSNTFS

Device drivers are software modules that can be plugged into an OS to handle a particular device. Operating System takes help from device drivers to handle all I/O devices.

The Device Controller works like an interface between a device and a device driver. I/O units (Keyboard, mouse, printer, etc.) typically consist of a mechanical component and an electronic component where electronic component is called the device controller.

There is always a device controller and a device driver for each device to communicate with the Operating Systems. A device controller may be able to handle multiple devices. As an interface its main task is to convert serial bit stream to block of bytes, perform error correction as necessary.

Any device connected to the computer is connected by a plug and socket, and the socket is connected to a device controller. Following is a model for connecting the CPU, memory, controllers, and I/O devices where CPU and device controllers all use a common bus for communication.

Synchronous vs asynchronous I/O

  • Synchronous I/O − In this scheme CPU execution waits while I/O proceeds

  • Asynchronous I/O − I/O proceeds concurrently with CPU execution

Communication to I/O Devices

I-o Data Cameras Definition

The CPU must have a way to pass information to and from an I/O device. There are three approaches available to communicate with the CPU and Device.

  • Special Instruction I/O
  • Memory-mapped I/O
  • Direct memory access (DMA)

Special Instruction I/O

This uses CPU instructions that are specifically made for controlling I/O devices. These instructions typically allow data to be sent to an I/O device or read from an I/O device.

Memory-mapped I/O

When using memory-mapped I/O, the same address space is shared by memory and I/O devices. The device is connected directly to certain main memory locations so that I/O device can transfer block of data to/from memory without going through CPU.

While using memory mapped IO, OS allocates buffer in memory and informs I/O device to use that buffer to send data to the CPU. I/O device operates asynchronously with CPU, interrupts CPU when finished.

The advantage to this method is that every instruction which can access memory can be used to manipulate an I/O device. Memory mapped IO is used for most high-speed I/O devices like disks, communication interfaces.

Direct Memory Access (DMA)

Slow devices like keyboards will generate an interrupt to the main CPU after each byte is transferred. If a fast device such as a disk generated an interrupt for each byte, the operating system would spend most of its time handling these interrupts. So a typical computer uses direct memory access (DMA) hardware to reduce this overhead.

Direct Memory Access (DMA) means CPU grants I/O module authority to read from or write to memory without involvement. DMA module itself controls exchange of data between main memory and the I/O device. CPU is only involved at the beginning and end of the transfer and interrupted only after entire block has been transferred.

Direct Memory Access needs a special hardware called DMA controller (DMAC) that manages the data transfers and arbitrates access to the system bus. The controllers are programmed with source and destination pointers (where to read/write the data), counters to track the number of transferred bytes, and settings, which includes I/O and memory types, interrupts and states for the CPU cycles.

The operating system uses the DMA hardware as follows −

StepDescription
1Device driver is instructed to transfer disk data to a buffer address X.
2Device driver then instruct disk controller to transfer data to buffer.
3Disk controller starts DMA transfer.
4Disk controller sends each byte to DMA controller.
5DMA controller transfers bytes to buffer, increases the memory address, decreases the counter C until C becomes zero.
6When C becomes zero, DMA interrupts CPU to signal transfer completion.

Polling vs Interrupts I/O

A computer must have a way of detecting the arrival of any type of input. There are two ways that this can happen, known as polling and interrupts. Both of these techniques allow the processor to deal with events that can happen at any time and that are not related to the process it is currently running.

Polling I/O

Polling is the simplest way for an I/O device to communicate with the processor. The process of periodically checking status of the device to see if it is time for the next I/O operation, is called polling. The I/O device simply puts the information in a Status register, and the processor must come and get the information.

Most of the time, devices will not require attention and when one does it will have to wait until it is next interrogated by the polling program. This is an inefficient method and much of the processors time is wasted on unnecessary polls.

Compare this method to a teacher continually asking every student in a class, one after another, if they need help. Obviously the more efficient method would be for a student to inform the teacher whenever they require assistance.

Interrupts I/O

An alternative scheme for dealing with I/O is the interrupt-driven method. An interrupt is a signal to the microprocessor from a device that requires attention.

I-o Data Cameras App

A device controller puts an interrupt signal on the bus when it needs CPU’s attention when CPU receives an interrupt, It saves its current state and invokes the appropriate interrupt handler using the interrupt vector (addresses of OS routines to handle various events). When the interrupting device has been dealt with, the CPU continues with its original task as if it had never been interrupted.