Description of the Application Example

This application example transfers up to 10 ASCII characters to the

SLC 5/03 processor. Each data packet less than 10 characters must

be terminated with a carriage return character (13 decimal) in order

to alert the BASIC module to transfer the data to the backplane. This

termination character may actually be any unique character. If you

require a different termination character, simply replace the “13” in

line 150 of the BASIC program with the decimal equivalent of the

new termination character.

Hardware and Software Configuration Information

N7:50 to N7:52 are the control words for the BTR function. N7:53

to N7:55 are the control words for the BTW function. For this

example, the following values must be placed in these words prior to

executing the ladder logic program:

• N7:50 – Must set bit 7 of this word to make it a BTR

• N7:51 – BT length, set to decimal 8

• N7:52 – RIO address (R, G, S), set to 100 decimal

• N7:53 – Must be sure bit 7 is a 0 to make it a BTW

• N7:54 – BT length, set to decimal 1 (only one word required to

transfer handshake bits).

• N7:55 – RIO address (R, G, S), set to 100 decimal

For this application example, the Remote I/O Adapter module is

configured as a logical rack 1, starting group 0,
logical rack size.

Also, 1-slot addressing and 57.6K baud is used.