Allen-Bradley 1771-DB

The BASIC Module provides math functions, report generation and BASIC language capabilities for any Allen-Bradley processor that communicates with the 1771 I/O system using block-transfer. It provides: basic programming using the Intel BASIC-52 language., math functions consistent with the BASIC-52 definition, two independently configurable serial ports capable of connecting to various user devices, user accessible real-time clock with 5 ms resolution, user accessible "wall" clock/calendar with 1 second resolution, program generation and editing using a dumb ASCII terminal or a T3/T4 Industrial Terminal in alphanumeric mode, program storage and retrieval using the 1770-SA/SB Recorder, block-transfer communication capability from a PLC-2, PLC-3 or PLC-5 family processor, and on board program PROM burning.

Your module is a one-slot module with the following functions and features:
- 13 K bytes of battery backed RAM for user programs.
- 32 K bytes of EPROM storage for user software routines.
- One RS-423A/232C compatible serial communications port(PROGRAM port) which works with ASCII terminals providing operator program interaction, command level input printer output, etc. The program port baud rate defaults to 1200 baud. Initially you must set your terminal for 1200 baud. Use CALL 78 to change the program port baud rate. The program port is fixed at no parity, 1 start bit, 1 stop bit and 8 data bits.