I can’t understand the programs for Siemens S7 400
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O( L DB600.DBB 2 L 0 I ) O “FAULT_DB_PROCESS”.E_Stop O “FAULT_DB_PROCESS”.TT100_HighTemp O “FAULT_DB_PROCESS”.TT101_HighTemp O “FAULT_DB_PROCESS”.TT102_HighTemp O “FAULT_DB_PROCESS”.TT103_HighTemp = “CriticalAlarm” This is a sequence of commands within an FC block; it seems to represent alarm conditions. I would like to know how this syntax comes about. Thank you
Stopping will only be triggered after alarms are issued for all three temperatures
What do O( ), L, DB600.DBB, 2 L, and 0 I all mean?
It is true when DB600.DBB 2 is not equal to 0
Thank you. I know now. O refers to the “or” logic, I is integer comparison
Everything is available in Step7’s help; just press F1 to access it
Well, F1 has a very comprehensive range of things