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http://www2.sea.siemens.com | Set 6 | 2008-02-01
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Touch Panel TP 177micro: for operator control and process monitoring of the entire weighing and production process
LOGO!Power 24 V/1,3 A: for supplying power to all control and weighing components
SIMATIC S7-200 224 XP: Distributed open- and closed-loop control of the weighing/dosing process and the production process
SIWAREX MS: recording the signal and forming the weight value
SIWAREX R-Series load cell (SP): converts the effect of loading into an electrical signal
Automation task:
To provide good comprehensibility, the features of the Micro Automation Set are explained using the example of an automation task.
In a packaging system, a check for completeness of the packaged goods is required before delivery. In the course of this quality assurance measure the goods are to be uniquely identified and all relevant data including time stamp are to be logged.
It is to be possible to import the log data to Office Excel. The automation of the logging process and the integration of the required components into the existing infrastructure of the packaging system are to be possible.
It must be possible to apply the check for completeness of the packaged goods also to other products with different content without extra work. The packaging system is to be operated and maintained exclusively via an HMI device. Operation is to be possible in German and in English.
Automation solution:
The automation solution uses an S7-200 controller and the SIWAREX MS weighing module with single point load cell. The weight value of the packaged goods is captured and compared to a reference value. This enables to check whether all components are complete. The packages of goods can be uniquely identified via a batch number.
The integrated time of day function and the memory module of the S7-200 controller enable a logging of the currently measured weight values with time stamp. Interfacing the S7-200 controller to a Windows PC using the PPI cable enables an automatic readout of the log data. Alternatively to the PPI connection data can be transferred via Ethernet, PROFIBUS or the telephone network.
The recipe function of the S7-200 controller is used to manage the reference weight of different product series. Using a TP 177micro the currently running packaging process can be monitored by screens providing German-English change language.
Startup Code
For the startup we offer you software examples with test code and test parameters as download. The software examples support you during the first steps and tests with your Micro Application Sets. They enable quick testing of hardware and software interfaces between the products described in the Micro Application Sets.
The startup code for Micro Automation Set 6 consists of the STEP 7-Micro/WIN user program for the S7-200 controller and the WinCC flexible configuration for TP 177micro.
MAS6 S7200 Startup Code
MAS6 WinCC Flexible Startup Code
MAS6 Technical Manual
Applications
The MICRO AUTOMATION SET is particularly suitable for use on simple automation tasks in the field of quality assurance - for example, to check packages for completeness by monitoring their weight. Further Applications:
Weighbridges
Weighing hoppers
Mixers
Belt scales
Roller scales
Level monitoring
Monitoring of crane and cable loads
Pressure measurement