Application for Com-Server
Applications for Serial Communication
without any additional expenditures, directly over the existing network
When the revision board asked why there were several lease lines and dial-up lines between the location, in addition to the intranet, the technicians realized that every adapter was already connected to all other adapters across the entire company.
Up- and downloading of controller programs as well as status monitoring are handled with the Siemens S7-200 using the PPI interface. Connection to the PC used as a programming device is frequently implemented using the RS232/PPI Multi-Master cable.
To extend this connection to a physically remote computer or to access from different work stations, a special serial cable with line drivers and if necessary a manual switcher generally needs to be installed. Alternative use of an Ethernet CP would necessitate modifying the S7 project/programm file. In addition, each individual PLC would needs its own CP.
Use of a Com-Server on the other hand provides a simple solution that works without any modifications to the controller program and usually eliminates any cabling expense. The RS232/PPI Multi-Master Cable is coinnected to the Com-Server instead of the PC. You install the COM Port Redirector on the PC and then simply tell Step7/Microwin on which virtual COM port it should look for the controller components - that's it.
Connect Siemens Logo!® and Display Logo!® TD over the network
The cable length of just a few meters allowed for connecting a Logo!® controller to a Display Logo!® TD often makes interesting applications impossible. With the help of two Com-Servers you can get around this problem and tunnel the serial connection through the Intra-/Internet - with virtually no spatial limitations. The following application example takes you step by step through the necessary settings and adjustments using two Highspeed Industry Com-Servers, Art. No. 58631 - This article has been replaced by the expanded successor model Com-Server ++, #58665..