Data Acquisition From Your Web Browser!
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Winner of a 2001 "Best in Test" award from Test &
Measurement World! |
webDAQ/100 is a complete data acquisition system with built-in web server, ASCII and binary reports, graphing, email, FTP, alarms, and more! Perfect for applications in: factory automation, industrial automation, process monitoring, environmental or building monitoring, temperature testing, and many other areas.
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A True Data Acquisition Appliance:
Plug, Browse, Download
500 KHz
32 Channels
12 Bit Accuracy
Eight 10-bit waveform output channels |
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webDAQ/100 is a high performance data acquisition unit with a built-in web server, so no programming is required. Just connect it, open your web browser, choose your acquisition options, data formats, etc. and download. You can even open your data directly in Excel or other programs.
webDAQ/100
Data Acquisition From Your Web Browser!
- No programming required
- Direct connection to your computer, over a LAN, or remote access
- See the new optional alarm feature
- New features in version 2
- Modbus ethernet and serial protocols supported
- Alarms
Every webDAQ/100 contains a complete web server built right into the box. Just connect it to your network, or direct to an Ethernet card in your computer, and open your web browser. You get complete control over channels, rates and other acquisition parameters, a dynamic view of your data, and direct download in a variety of formats. Creating your own web server interface provides an ideal customization path for OEM's.
New version 2 features include modbbus ethernet and serial protocol to provide an interface to common HMI factory automation packages such as Wonderware and Intellution IFIX. Version 2 also provides individual channel alarms and global alarms to monitor and act on inputs.
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webDAQ/100
Optional Alarm Feature
webDAQ/100 alarms let you define up to two limit alarms per analog input channel, and a bit pattern alarm on the digital input channel. In addition, you can define up to four global alarms, which are any combination of channel alarms you choose. For example, if IN1 through IN4 are temperature input channels, you might define a high temperature limit alarm on each channel, and then define global alarm A to occur whenever any of these high temperatures is present.
Alarm conditions are tested once per second, in both IDLE and RUN modes.
The alarm status is displayed on the home page, next to each channel, with the global alarms shown on the right side.
Input channel alarms
Each analog input channel can have up to two different alarm conditions defined. You set these conditions in the Acquisition Setup page, by clicking on the channel in the terminal block diagram. For each alarm you can set:
- Enable - enable or disable the alarm
- Condition - the type of limit comparison: above or below
- Level - the value for the alarm comparison. This is given in the measured units defined for that channel (e.g., degC for temperatures).
- Hysteresis - the noise margin for the alarm comparison. There is one hysteresis setting for both channel alarms. The noise margin is used to avoid false appearence of multiple alarms events as the value varies slightly near the alarm limit.
The digital input channel can also have a single alarm condition defined, as a pattern of bits. This is useful if you have mechnical switches that should create alarm events:
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Enable - enable or disable the alarm
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Mask - a pattern indicating which input bits are to be tested or ignored. For example, a mask of 15 has all four bits turned on, so all four input bits will be used in the alarm test. A mask of zero means no bits. A mask of 3 has the lower two bits turned on, so only DI1 and DI2 will be tested. The alarm uses an OR function, so if any enabled bit is in the alarm state, the DIN alarm is true.
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Level - the bit pattern to compare against for an alarm condition. This allows you to make the alarm true on either a 0 or 1 input value. Note that only bits enabled by the Mask setting are involved in the comparison.
Global alarms
There are four global alarms named A, B, C, and D. Each can be defined as occurring on any desired combination of individual channel alarms. You define the global alarms in the Acquisition Setup screen by clicking on the Setup Global Alarms button, which is on the right-hand side of the web page, below the triggering setup.
Digital Output on Alarm
You can optionally have your four global alarm conditions indicated in hardware on the digital output port of webDAQ/100. Simply turn on this option in the global alarm setup screen. Alarms A,B,C, and D correspond to digital output bits 1 through 4. Each bit will be set to 1 whenever the corresponding alarm condition is true. (Note that you cannot also configure the digital output bits for timed pattern generation - the two functions are incompatible with each other).
If you wish to connect indicator devices such as buzzers or lights to the digital output port of webDAQ/100, please keep in mind the current drive limit specifications of 15mA (source) and 24mA (sink). Technical support will gladly help you determine the best way to connect external devices to the DO port.
Triggering reports on alarm conditions
One of the most powerful features of the alarm software option is the ability to trigger scheduled reports on alarm events. You can have webDAQ/100 send you an email when an alarm occurs. Through features of your email system, you may even be able to have a wireless pager message occur when the email is sent (see your email system administrator to see how this might be configured on your particular email system).
Accessing alarm information through programs and the command-line interface
The programming interface of webDAQ/100 provides full support for setting up alarm conditions and checking their status.
The page below shows one of the global alarm setups as it appears in the browser interface. In this case, the ten channels 1A-5B are all being monitored for a threshold crossing. If any one of them should activate an alarm, the global alarm will be activated and one digital output port will change state providing a hardware indication of the alarm condition.
System &
Solution at Affordable Price 
