Allen-Bradley SLC 500 Manual page 99

The last sequence is another Data Display. Note that the Command Type starts with a Receive and ends
with a Send command. The register RL3 will not be updated automatically but will change when the
terminal sends a Command String in the format specified by the Receive Command String. If the
received command string is valid, the Send command sends out a Command String.
Click OK to close the dialog box and click OK to close the Edit Sequences dialog box.
Once all the sequences are created, any associations of registers and sequences are made in the
Associate Sequences dialog box. Click the Associate Sequences button. The dialog box will show all of
the assigned registers. Note that RA1 is currently selected and all assignments are set to <None>. That
means that this register is not in the Poll list and no Button actions are associated. RA1 is the ASCII
register used for displaying Invalid Messages. RA2 will appear the same way since it is used to display
Error Messages.
ASCII Flex Protocol • • • • 267
QUICKDESIGNER