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Step 3: Now that communication is established, programming of the units can begin (alternatively, units can be programmed individually by connecting the master terminal to one unit at a time).
To allow daisy-chaining between multiple controllers, the ERRLVL1 command must be used to prevent units from sending error messages and command prompts. In every daisy-chained unit, the ERRLVL1 command should be placed in the program that is defined as the STARTP program:
Program:
DEF chain | ; Begin definition of program chain |
ERRLVL1 | ; Set error level to 1 |
GOTO main | ; Go to program main |
END | ; End definition of program chain |
STARTP chain | ; Designates program chain as the power-up program |
To define program main for unit #0:
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