Pepperl+Fuchs VAG-PB-G4F-R4 043249

The VAG-PB-G4F-R4 is a complete PROFIBUS slave designed for use in the field. The G4 field housing of the PROFIBUS gateway offers all the advantages of the serial master in this design. Two operating modes are available for the exchange of data across PROFIBUS DP: standard and expanded. In standard mode the gateway uses a fixed I/O configuration so that it can be put into operation without additional parameter assignment. In expanded mode the data structure can be optimised, enabling the user to define the data size sent to the PROFIBUS master. Owing to the reduction of required data, less I/O space is needed in the PLC. Two push buttons are used for address assignment, acceptance of the desired configuration, adjustment of the PROFIBUS address and baud rate. In configuration mode, all detected AS-Interface slaves are displayed on the 2-digit LCD. In normal operation, the LCD is blank unless the master detects a faulty AS-Interface slave.There are 7 LEDs on the front panel, showing the current status of the AS-Interface line. PLC Functionality The VAG-PB-G4F-R4 provides 16 kByte program memory, 8 kByte RAM, 1024 counters and 1024 timers for PLC functionality. These capacities suffice to process data on the ASInterface. Thus the master can also be operated in stand-alone mode. The program processing time is 2 ms per 1000 word commands. The programming language is based on the STEP5 programming language. The AS-Interface CTRL functions (upload, download, start, stop, read and write internal memory) are available in expanded mode.