OPTOCODE

FRABA POSITAL’s OPTOCODE line of absolute rotary encoders now includes models with a Modbus TCP interface. With the implementation of this Ethernet-based network protocol, FRABA has extended the application range for OPTOCODE devices, including, for example, building, process and laboratory automation. The new Modbus encoders provide the full functional scope of FRABA's Ethernet TCP/IP models. Apart from position and velocity values, the output data also includes a time stamp. Each of these values can be switched in as required. The encoders can be connected to a PC, a network or Modbus PLC via a robust M12 plug. The maximum data exchange rate is 100 MBit/s via Modbus/TCP. An integrated web server provides HTML pages with embedded Java applets, allowing the encoders to be configured, read out and tested via company networks or Internet.

Like all OPTOCODE encoders, the Modbus models use a tried and tested optoelectronic scanning method to record position values. This method is based on the concurrent analysis of a Gray code pattern and two incremental tracks. As a single-turn model, the rotary encoders' highly integrated Opto-ASIC provides a resolution of 65,536 steps per revolution (16 bit). Additionally, the multi-turn model registers a maximum of 16,384 revolutions (14 bit). Backup batteries are unnecessary. All Modbus models come in blind hollow or solid shaft versions. They are IP64/65 protected, thereby qualifying for use in rugged industrial environments.