ViDEC GmbH - VIDEC GmbH

• secure data transmission via GPRS
• usage of standard-components (SPS and Modem)
• usage of industrial standard interfaces and protocols
• open structure for connecting various types of hardware
  

The mobile service GPRS (General Packet Radio Service) provides an economical and effective solution for any application that relies on the exchange of data with telecontrol sub-stations. The concept of an ODP (Open Data Port) enables the user to communicate with different PLC systems. Transmission is either online or the data takes the form of timestamped historical values.
GPRS ODP has an open and transparent data communication with a complete cost monitoring for the user. Special features include compatibility with various PLC
manufacturers and also userfriendly configuration.

Connection between sub-station and central

The telecontrol sub-station is equipped with a GPRS modem from Dr. Neuhaus. This enables the sub-station to connect with the relevant provider’s nearest available transmitter. Once connection is made, the data leaves the wireless network and enters the TCP/IP network of the provider. The authenticated data is then made available to OPC level via DSL connection using the integrated and DIN-standardised TSC protocol. Depending on the manufacturer, the PLC may also be parameterised by the control centre.

The Online mode
Process data are read out cyclically from the PLC and displayed in the control system via the OPC interface. Switching operations can also be performed from the centre.

Data transfer security
With a GPRS ODP solution, you can be sure of not losing any data. If the online GPRS cannot connect, the timestamped data are backed up in the PLC for later retrieval. The control centre immediately detects communication errors and a direct message can be sent to the system personnel (also standby alarm using MelSYS e.g. via mobile phone). All communication information is logged, leaving it available for system and communication analysis.

Historical data
Historical data are retrieved either cyclically or under user control. The timestamped historical data can be chronologically sorted via a certified ACRON interface. Buffering in the PLC depends on the number of variables and the capacity of the PLC memory.

From the configurationpoint of view

• Ease of operation
• No serial port configuration
• PLC can be configured from the control
• centre (manufacturer-specific)
• Full training and support of technologies

From the technical point of view

• Open standard interfaces with the control system (OPC Server)
• Multi-processor capability(new generation of processors)
• Certified interface to ACRON
• Online mode and timestamped historical data
  Based on components from Dr.Neuhaus
• TSC DIN protocol implemented
• Communication analysis with history
• Runs on XP, 2003 Server, Vista 

From the managerial point of view

• Complete cost control of entire communications
• Manufacturer-independent (e.g. Siemens S7 200,300, 400, WAGO, Phoenix, Schneider, ...)
• Up to 10,000 outer stations (also mixed peripherals)
• Free support
• Good price/performance ratio