ProgrammingABB Control - AC 31 Page 5-411SBC 260400 R1001-b 06.995.8. Detecting the first cycle with the M 255.15 variableThe bit M 255.15 should be used when the detection of the first cycle is required, for example,to initialize certain parameters or set certain values to zero.The description of how to use this bit is given in the following example.The bit M 225.15 should be set to 1 before the end of the first cycle. This bit has theparticularity of being set to zero systematically, whatever the backup configuration, at thecentral unit startup.%M255.15 initial:&%I62.00%I62.01=S%O62.00POTENTIOMETER_0POTENTIOMETER_1%MW000.00%MW000.01TRUE %M255.15initial:Initialization test:Initializationprogram:Rest of the program
