Beckhoff First Scan Bit ((exclusive)) Review

But here’s the catch: unlike traditional PLCs (e.g., Siemens with OB100 or Rockwell with FirstScan ), Beckhoff’s approach is more flexible—but also more confusing for newcomers. This article will dissect every method to detect and utilize the first scan cycle in TwinCAT, from standard PLC libraries to advanced object-oriented techniques.

(* Your regular cyclic code runs here *) nCounter := nCounter + 1; beckhoff first scan bit

// -- Main control loop -- RunMachineLogic(); But here’s the catch: unlike traditional PLCs (e

PROGRAM MAIN VAR bInitDone : BOOL; myCounter : INT; END_VAR PROGRAM MAIN VAR bInitDone : BOOL