Communication Modules | GE IC600BF949

The GE Fanuc IC600BF949 is an ASCII/BASIC communication coprocessor module developed for the GE Series Six programmable logic controller system. Equipped with 28 KB of battery-backed RAM and a resident BASIC language interpreter, this circuit board processes complex data routines, custom serial protocols, and ASCII text string manipulation. By executing dedicated programming tasks independently of the main controller, it offloads computationally intensive communication functions without extending the PLC CPU scan time.

Serial Interface and Protocol Support

The module features two faceplate-mounted D-type serial ports for interfacing with external peripheral devices such as operator terminals, barcode readers, weigh scales, and host computers. Port 1 supports standard RS-232C communications, while Port 2 can be configured for either RS-232C or long-distance RS-422 differential signaling. Communication parameters—including baud rates ranging from 110 to 19,200 bps, parity, and data bits—are configurable via hardware DIP switches located directly on the printed circuit board.

System Integration and Diagnostics

Designed for single-slot installation, the card mounts into any standard Series Six CPU rack or High Capacity I/O rack. It interfaces directly with the system backplane to read and write CPU registers, scratchpad areas, and I/O data tables. Front-panel LED indicators provide real-time diagnostic feedback for overall module status as well as active transmit and receive data traffic across both serial ports.

Technical Parameters

Frequently Asked Questions

Q: How does the GE IC600BF949 execute serial routines without affecting the main PLC performance?A: The module functions as an autonomous coprocessor with its own resident BASIC interpreter and onboard microprocessor, allowing it to run custom programs parallel to the PLC ladder logic without impacting CPU scan times.

Q: What is the difference between serial Port 1 and Port 2 on the IC600BF949 module?A: Port 1 is dedicated to RS-232C serial communication, whereas Port 2 can be set to either RS-232C or RS-422 to accommodate longer transmission distances up to 4,000 feet.

Q: What is the memory capacity of the IC600BF949 compared to other modules in the same product line?A: The IC600BF949 provides 28 KB of user memory, whereas variant models like the IC600BF944 feature 12 KB.